Interesting Esoterica

728 entries

Collections:

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• Art (25)
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• Computational complexity of games (10)
• Drama! (11)
• Easily explained (215)
• Education (8)
• Fibonaccinalia (14)
• Food (30)
• Fun maths facts (129)
• Games to play with friends (47)
• Geometry (108)
• History (48)
• Integerology (76)
• Lists and catalogues (54)
• Modelling (22)
• Music (8)
• Notation and conventions (24)
• Probability and statistics (48)
• Protocols and strategies (31)
• Puzzles (67)
• The act of doing maths (40)
• The groups group (38)
• Things to make and do (53)
• Unusual arithmetic (40)
• Unusual computers (17)

Sort by date added | title | date published

• Counterexamples To a Theorem of Cauchy
  • Published in 1968
  • Added on 2024-10-09
• Ropes, fractions, and moduli spaces
  • Published in 2023
  • Added on 2024-09-30
• Look, There's More to Say about Conway's Look and Say Sequence
  • Published in 2024
  • Added on 2024-09-05
• Tumbling Downhill along a Given Curve
  • Published in 2024
  • Added on 2024-07-24
• Normal Numbers are Normal
  • Published in 2006
  • Added on 2024-07-11
• Do Hares Eat Lynx?
  • Published in 1973
  • Added on 2024-06-29
• Integers that are not the sum of positive powers
  • Published in 2024
  • Added on 2024-06-21
• Iterated failures of choice
  • Published in 2019
  • Added on 2024-06-10
• Sur la loi de répartition du k-ième facteur premier d'un entier
  • Published in 2002
  • Added on 2024-05-24
• Online Matching Pennies
  • Published in 2003
  • Added on 2024-05-20
• DONUT: Database of Original & Non-Theoretical Uses of Topology
  • Published in 2022
  • Added on 2024-05-20
• Erdős Problems
  • Published in 2024
  • Added on 2024-05-20
• Squigonometry: The Study of Imperfect Circles
  • Published in 2022
  • Added on 2024-04-10
• The Cardboard Computer
  • Published in 2024
  • Added on 2024-04-10
• Polyamorous Scheduling
  • Published in 2024
  • Added on 2024-04-10
• A simple group of order 44,352,000
  • Published in 1968
  • Added on 2024-04-02
• The Flapping Birds in the Pentagram Zoo
  • Published in 2024
  • Added on 2024-03-14
• The Flower Calculus
  • Published in 2024
  • Added on 2024-03-11
• Random Formula Generators
  • Published in 2021
  • Added on 2024-03-11
• My Favorite Math Jokes
  • Published in 2024
  • Added on 2024-03-06
• The Sine of a Single Degree
  • Published in 2017
  • Added on 2024-01-15
• How big a table do you need for your jigsaw puzzle?
  • Published in 2023
  • Added on 2024-01-15
• MathBases
  • Published in 2023
  • Added on 2023-12-09
• Sorry, the nilpotents are in the center
  • Published in 2018
  • Added on 2023-11-17
• The Euclidean Algorithm Generates Traditional Musical Rhythms
  • Published in 2005
  • Added on 2023-10-25
• When Can You Tile an Integer Rectangle with Integer Squares?
  • Published in 2023
  • Added on 2023-10-09
• Dubious Identities: A Visit to the Borwein Zoo
  • Published in 2023
  • Added on 2023-10-09
• Conway and Doyle Can Divide by Three, But I Can't
  • Published in 2023
  • Added on 2023-09-29
• Flat origami is Turing Complete
  • Published in 2023
  • Added on 2023-09-29
• Mathematical proofs with cardboard and paper
  • Published in 2023
  • Added on 2023-08-24
• Distant decimals of $π$
  • Published in 2017
  • Added on 2023-08-14
• Hyperbolic Minesweeper is in P
  • Published in 2020
  • Added on 2023-08-14
• A sign that used to annoy me, and still does
  • Published in 2023
  • Added on 2023-08-14
• Lyons Taming
  • Published in 2023
  • Added on 2023-08-14
• Maximum mutational robustness in genotype–phenotype maps follows a self-similar blancmange-like curve
  • Published in 2023
  • Added on 2023-08-02
• Wallpaper Functions
  • Published in 2002
  • Added on 2023-06-20
• Solving Rush Hour, the Puzzle
  • Published in 2018
  • Added on 2023-03-22
• Foldings and Meanders
  • Published in 2013
  • Added on 2023-03-22
• MetaNumbers - Number encyclopedia
  • Published in 2019
  • Added on 2023-03-22
• Erich's Packing Center
  • Published in 2020
  • Added on 2023-03-20
• A curious result related to Kempner's series
  • Published in 2008
  • Added on 2023-02-27
• Hedra Zoo
  • Published in 2022
  • Added on 2023-02-02
• The Packing Chromatic Number of the Infinite Square Grid is 15
  • Published in 2023
  • Added on 2023-01-26
• Sub shoot!
  • Published in 2008
  • Added on 2023-01-08
• Lucy and Lily: A Game of Geometry and Number Theory: The American Mathematical Monthly: Vol 109, No 1
  • Added on 2022-11-14
• PIGTIKAL (puzzles in geometry that I know and love)
  • Published in 2009
  • Added on 2022-10-14
• Maclaurin Integration: A Weapon Against Infamous Integrals
  • Published in 2022
  • Added on 2022-10-08
• Arbitrarily Close
  • Published in 2019
  • Added on 2022-10-08
• GroupNames
  • Published in 2022
  • Added on 2022-09-09
• Euclidean traveller in hyperbolic worlds
  • Published in 2022
  • Added on 2022-09-09
• Martin Gardner column to book mapping project
  • Published in 2022
  • Added on 2022-09-08
• Strange Expectations and the Winnie-the-Pooh Problem
  • Published in 2018
  • Added on 2022-08-22
• DistanceRegular.org
  • Published in 2017
  • Added on 2022-08-22
• List of numbers - Googology Wiki
  • Published in 2013
  • Added on 2022-08-09
• Mathematical Marbling
  • Published in 2003
  • Added on 2022-07-12
• Stuttering look and say sequences and a challenger to Conway's most complicated algebraic number from the silliest source
  • Published in 2022
  • Added on 2022-07-08
• On The Euclidean Algorithm: Rhythm Without Recursion
  • Published in 2022
  • Added on 2022-07-08
• The mathematics of burger flipping
  • Published in 2022
  • Added on 2022-07-08
• The Strong Law of Small Numbers
  • Published in 1988
  • Added on 2022-07-05
• Filling space with hypercubes of two sizes -- The pythagorean tiling in higher dimensions
  • Published in 2022
  • Added on 2022-05-13
• Who's Afraid of Mathematical Diagrams?
  • Added on 2022-05-13
• Characteristic Polynomial Database
  • Published in 2019
  • Added on 2022-04-24
• A simple mnemonic to compute sums of powers
  • Published in 2022
  • Added on 2022-04-24
• A note on the Screaming Toes game
  • Published in 2020
  • Added on 2022-04-24
• Convex Equipartitions: The Spicy Chicken Theorem
  • Published in 2013
  • Added on 2022-04-24
• Descending Dungeons and Iterated Base-Changing
  • Published in 2006
  • Added on 2022-02-28
• Easy Proof of Three Recursive $π$-Algorithms -- Einfacher Beweis dreier rekursiver $π$-Algorithmen
  • Published in 2019
  • Added on 2022-02-25
• Tiling with arbitrary tiles
  • Published in 2015
  • Added on 2022-02-23
• Less Mundane Applications of the Most Mundane Functions
  • Published in 2022
  • Added on 2022-02-16
• MATHREPO - Mathematical Data and Software
  • Published in 2021
  • Added on 2022-02-16
• How to Solve "The Hardest Logic Puzzle Ever" and Its Generalization
  • Published in 2022
  • Added on 2022-02-16
• Generating graphs randomly
  • Published in 2022
  • Added on 2022-02-16
• Max/Min Puzzles in Geometry
  • Published in 2022
  • Added on 2022-02-16
• Pop-Up Geometry
  • Published in 2022
  • Added on 2022-02-16
• Clark Kimberling's Encyclopedia of Triangle Centers
  • Published in 1999
  • Added on 2022-02-16
• Database of Permutation Pattern Avoidance
  • Published in 2011
  • Added on 2022-02-16
• FindStat
  • Published in 2019
  • Added on 2022-02-16
• House of Graphs
  • Published in 2010
  • Added on 2022-02-16
• A catalog of matchstick graphs
  • Published in 2013
  • Added on 2022-02-16
• Mathematics ClipArt
  • Published in 2004
  • Added on 2022-01-18
• Check Digits
  • Published in 1999
  • Added on 2022-01-18
• On Kaprekar's Junction Numbers
  • Published in 2021
  • Added on 2022-01-10
• Fibbinary Zippers in a Monoid of Toroidal Hamiltonian Cycles that Generate Hilbert-Style Square-Filling Curves
  • Published in 2022
  • Added on 2021-12-08
• Rustan Leino's Puzzles
  • Published in 2009
  • Added on 2021-11-23
• How Not to Compute a Fourier Transform
  • Published in 2020
  • Added on 2021-11-20
• Bell-ringing methods as polyhedra
  • Published in 2015
  • Added on 2021-11-20
• Yet another Proof of an old Hat
  • Published in 2021
  • Added on 2021-11-20
• Database of Ring Theory
  • Published in 2014
  • Added on 2021-11-20
• Iconicity in Mathematical Notation: Commutativity and Symmetry
  • Published in 2020
  • Added on 2021-11-20
• The design of mathematical language
  • Published in 2021
  • Added on 2021-11-20
• The Mathematical Movie Database
  • Published in 2004
  • Added on 2021-11-20
• Ouroboros Functionals, Families of Ouroboros Functions, and Their Relationship to Partial Differential Equations and Probability Theory
  • Published in 2021
  • Added on 2021-08-29
• Some instructive mathematical errors
  • Published in 2021
  • Added on 2021-08-29
• SET with a Twist
  • Published in 2021
  • Added on 2021-08-29
• Fruit Diophantine Equation
  • Published in 2021
  • Added on 2021-08-29
• Yule's "Nonsense Correlation" Solved!
  • Published in 2016
  • Added on 2021-08-29
• Skateboard Tricks and Topological Flips
  • Published in 2021
  • Added on 2021-08-29
• A Gambler that Bets Forever and the Strong Law of Large Numbers
  • Published in 2021
  • Added on 2021-06-07
• Gamilaraay kinship revisited: incidence of recessive disease is dynamically traded-off against benefits of cooperative behaviours
  • Published in 2021
  • Added on 2021-06-07
• Real Analysis in Reverse
  • Published in 2012
  • Added on 2021-06-07
• Every Salami has two ends
  • Published in 2021
  • Added on 2021-05-26
• Tilings Encyclopedia
  • Added on 2021-05-18
• Perimeter-minimizing pentagonal tilings
  • Published in 2014
  • Added on 2021-05-04
• The fluid mechanics of poohsticks
  • Published in 2021
  • Added on 2021-04-20
• On Mathematical Symbols in China
  • Published in 2015
  • Added on 2021-04-20
• An integral's journey over the real line
  • Published in 2021
  • Added on 2021-04-20
• Ordner: index of real numbers
  • Published in 2019
  • Added on 2021-04-20
• The best known packings of equal circles in a square
  • Published in 1999
  • Added on 2021-04-20
• Fungrim: The Mathematical Functions Grimoire
  • Published in 2019
  • Added on 2021-04-20
• EqWorld - The World of Mathematical Equations
  • Published in 2004
  • Added on 2021-04-15
• Dependency Graph of Propositions in Euclid’s Elements
  • Published in 2007
  • Added on 2021-04-14
• Generation of real algebraic loci via complex detours
  • Published in 2015
  • Added on 2021-04-10
• Gödel for Goldilocks: A Rigorous, Streamlined Proof of (a variant of) Gödel's First Incompleteness Theorem
  • Published in 2014
  • Added on 2021-04-10
• A Self-Referential Property of Zimin Words
  • Published in 2016
  • Added on 2021-03-31
• The cocked hat
  • Published in 2020
  • Added on 2021-03-23
• Three friendly walkers
  • Published in 2016
  • Added on 2021-03-22
• Maximum overhang
  • Published in 2007
  • Added on 2021-03-15
• The Amazing $3^n$ Theorem and its even more Amazing Proof [Discovered by Xavier G. Viennot and his École Bordelaise gang]
  • Published in 2012
  • Added on 2021-03-15
• The term `angle' in the international system of units
  • Published in 2021
  • Added on 2021-03-15
• Programming the Hilbert curve
  • Published in 2004
  • Added on 2021-02-12
• Pythagorean Triples, Complex Numbers, Abelian Groups and Prime Numbers
  • Published in 2021
  • Added on 2021-02-12
• "It is like egg": Paul Lorenzen and the collapse of proofs of consistency
  • Published in 2021
  • Added on 2021-02-12
• Braids which can be plaited with their threads tied together at each end
  • Published in 1962
  • Added on 2021-02-12
• Hilbert 13: Are there any genuine continuous multivariate real-valued functions?
  • Published in 2021
  • Added on 2021-02-02
• Are There More Finite Rings than Finite Groups?
  • Published in 2020
  • Added on 2021-01-06
• Counting Candy Crush Configurations
  • Published in 2019
  • Added on 2021-01-06
• Envelopes are solving machines for quadratics and cubics and certain polynomials of arbitrary degree
  • Published in 2020
  • Added on 2021-01-06
• The real numbers - a survey of constructions
  • Published in 2015
  • Added on 2021-01-06
• "Match-Stick" Geometry
  • Published in 1939
  • Added on 2020-12-20
• Graphs, friends and acquaintances
  • Published in 2016
  • Added on 2020-11-25
• Big fields that are not large
  • Published in 2020
  • Added on 2020-11-17
• A Prime-Representing Constant
  • Published in 2020
  • Added on 2020-11-06
• Configuration spaces of hard squares in a rectangle
  • Published in 2020
  • Added on 2020-11-06
• Generating functions for generating trees
  • Published in 2002
  • Added on 2020-10-24
• Least Significant Non-Zero Digit of n!
  • Published in 2000
  • Added on 2020-10-22
• The Penney's Game with Group Action
  • Published in 2020
  • Added on 2020-10-16
• On the Dreaded Right Bousfield Localization
  • Published in 2007
  • Added on 2020-10-16
• World's shortest explanation of Gödel's theorem
  • Published in 2009
  • Added on 2020-10-16
• Ice cream and orbifold Riemann-Roch
  • Published in 2012
  • Added on 2020-10-16
• Fertility Numbers
  • Published in 2018
  • Added on 2020-10-16
• The Phillip Island penguin parade (a mathematical treatment)
  • Published in 2016
  • Added on 2020-10-16
• Mathematics with a metamathematical flavour.
  • Added on 2020-10-16
• Mathematics, morally
  • Published in 2004
  • Added on 2020-10-16
• A Midsummer Knot's Dream
  • Published in 2010
  • Added on 2020-09-21
• An Interesting Serendipitous Real Number
  • Published in 2000
  • Added on 2020-09-21
• The No-Flippancy Game
  • Published in 2020
  • Added on 2020-09-21
• A minus sign that used to annoy me but now I know why it is there
  • Published in 2010
  • Added on 2020-09-21
• You Could Have Invented Spectral Sequences
  • Published in 2006
  • Added on 2020-09-21
• Mangoes and Blueberries
  • Published in 1999
  • Added on 2020-09-21
• Paperfolding morphisms, planefilling curves, and fractal tiles
  • Published in 2010
  • Added on 2020-09-21
• Plane-filling curves on all uniform grids
  • Published in 2016
  • Added on 2020-09-21
• Parking Functions: Choose Your Own Adventure
  • Published in 2020
  • Added on 2020-09-21
• There are not Exactly Five Objects
  • Published in 1984
  • Added on 2020-09-21
• Astonishing Numbers
  • Published in 2001
  • Added on 2020-08-28
• An Optimal Solution for the Muffin Problem
  • Published in 2019
  • Added on 2020-08-17
• Some Doubly Exponential Sequences
  • Published in 1970
  • Added on 2020-07-13
• Goldbug Variations
  • Published in 2005
  • Added on 2020-06-12
• Indigenous perspectives in maths: Understanding Gurruṯu
  • Published in 2020
  • Added on 2020-06-08
• Gergonne's Card Trick, Positional Notation, and Radix Sort
  • Published in 2017
  • Added on 2020-05-30
• Infinitude of Primes Using Formal Language Theory
  • Published in 2020
  • Added on 2020-05-25
• 38406501359372282063949 & all that: Monodromy of Fano Problems
  • Published in 2020
  • Added on 2020-05-06
• Word calculus in the fundamental group of the Menger curve
  • Published in 2013
  • Added on 2020-05-02
• The distance of a permutation from a subgroup of \(S_n\)
  • Published in 2005
  • Added on 2020-04-30
• Shadow movies not arising from knots
  • Published in 2011
  • Added on 2020-04-21
• Projectivizing Set
  • Published in 2020
  • Added on 2020-04-19
• Four Pages Are Indeed Necessary for Planar Graphs
  • Published in 2020
  • Added on 2020-04-19
• Conway's Tiling Groups on JSTOR
  • Published in 1990
  • Added on 2020-04-15
• Extreme Proofs I: The Irrationality of √2
  • Published in 2013
  • Added on 2020-04-13
• Knots and links in spatial graphs
  • Published in 1983
  • Added on 2020-04-12
• How long is my toilet roll? – a simple exercise in mathematical modelling
  • Published in 2013
  • Added on 2020-04-09
• Computing Linkages
  • Published in 2010
  • Added on 2020-04-06
• Fusible numbers and Peano Arithmetic
  • Published in 2020
  • Added on 2020-04-01
• A catalogue of mathematical formulas involving π, with analysis
  • Published in 2020
  • Added on 2020-03-27
• The Role of Number Notation: Sign-Value Notation Number Processing is Easier than Place-Value
  • Published in 2012
  • Added on 2020-03-19
• On Some two way Classifications of Integers
  • Published in 1959
  • Added on 2020-03-13
• Theory and applications of the double-base number system
  • Published in 1999
  • Added on 2020-02-03
• Sandwich semigroups in diagram categories
  • Published in 2019
  • Added on 2020-02-03
• Small-data computing: correct calculator arithmetic
  • Published in 2017
  • Added on 2020-01-13
• The no-three-in-line problem on a torus
  • Published in 2012
  • Added on 2019-12-10
• A unique pair of triangles
  • Published in 2018
  • Added on 2019-12-10
• “Lights Out” and Variants
  • Published in 2017
  • Added on 2019-12-09
• The Graph Menagerie: Abstract Algebra and the Mad Veterinarian
  • Published in 2011
  • Added on 2019-11-06
• Port-and-Sweep Solitaire
  • Published in 2010
  • Added on 2019-10-12
• Finding a princess in a palace: A pursuit-evasion problem
  • Published in 2012
  • Added on 2019-10-08
• Catching a mouse on a tree
  • Published in 2015
  • Added on 2019-10-08
• How to Hunt an Invisible Rabbit on a Graph
  • Published in 2015
  • Added on 2019-10-08
• Palindromes in Different Bases: A Conjecture of J. Ernest Wilkins
  • Published in 2009
  • Added on 2019-09-14
• Percolation is Odd
  • Published in 2019
  • Added on 2019-09-14
• Fractal Sequences
  • Published in 1999
  • Added on 2019-08-21
• Creation of Hyperbolic Ornaments
  • Published in 2014
  • Added on 2019-08-08
• Numbers for Masochists: A Guide to Mental Factoring
  • Published in 2018
  • Added on 2019-07-31
• Fiboquadratic Sequences and Extensions of the Cassini Identity Raised From the Study of Rithmomachia
  • Published in 2015
  • Added on 2019-07-18
• Chords of an ellipse, Lucas polynomials, and cubic equations
  • Published in 2018
  • Added on 2019-06-30
• Hex: A Strategy Guide
  • Published in 2019
  • Added on 2019-05-31
• Brainfilling Curves - a Fractal Bestiary
  • Published in 2012
  • Added on 2019-05-09
• A Contribution to the Mathematical Theory of Big Game Hunting
  • Published in 1938
  • Added on 2019-05-09
• Planar Hypohamiltonian Graphs on 40 Vertices
  • Published in 2013
  • Added on 2019-05-09
• The Swiss-Cheese Operad
  • Published in 1998
  • Added on 2019-05-09
• The graphs behind Reuleaux polyhedra
  • Published in 2019
  • Added on 2019-05-09
• A universal differential equation
  • Published in 1981
  • Added on 2019-05-09
• The Sensual (quadratic) Form
  • Published in 1997
  • Added on 2019-05-09
• Performing Mathematical Operations with Metamaterials
  • Published in 2014
  • Added on 2019-03-26
• Brazilian Primes Which Are Also Sophie Germain Primes
  • Published in 2019
  • Added on 2019-03-13
• The Takagi Function and Its Properties
  • Published in 2011
  • Added on 2019-03-04
• Codes, Lower Bounds, and Phase Transitions in the Symmetric Rendezvous Problem
  • Published in 2016
  • Added on 2019-03-02
• Yet Another Single Law for Lattices
  • Published in 2003
  • Added on 2019-03-02
• The Instructor's Guide to Real Induction
  • Published in 2012
  • Added on 2019-03-02
• Ley statistics
  • Published in 2014
  • Added on 2019-03-02
• What Is an Envelope?
  • Published in 1981
  • Added on 2019-02-04
• What is a closed-form number?
  • Published in 1998
  • Added on 2019-01-09
• Amusing Permutation Representations of Group Extensions
  • Published in 2018
  • Added on 2019-01-01
• Doing Math in Jest: Reflections on Useless Math, the Unreasonable Effectiveness of Mathematics, and the Ethical Obligations of Mathematicians
  • Published in 2018
  • Added on 2019-01-01
• Mathematics applied to dressmaking
  • Published in 1994
  • Added on 2018-11-29
• Rectangle Arithmetic
  • Published in 2006
  • Added on 2018-11-27
• Seven Trees in One
  • Published in 1994
  • Added on 2018-11-26
• Duotone Truchet-like tilings
  • Published in 2009
  • Added on 2018-11-13
• Prime Number Races
  • Published in 2004
  • Added on 2018-11-12
• Conway's doughnuts
  • Published in 2018
  • Added on 2018-11-04
• Noncrossing partitions under rotation and reflection
  • Published in 2005
  • Added on 2018-10-27
• Some Fundamental Theorems in Mathematics
  • Published in 2018
  • Added on 2018-10-24
• A Tiling Database
  • Published in 2011
  • Added on 2018-10-24
• Enumeration of m-ary cacti
  • Published in 1998
  • Added on 2018-10-23
• Calculator Forensics
  • Published in 2000
  • Added on 2018-10-16
• Setting linear algebra problems
  • Published in 1997
  • Added on 2018-09-27
• Power-law distributions in empirical data
  • Published in 2007
  • Added on 2018-09-24
• Finding the Bandit in a Graph: Sequential Search-and-Stop
  • Published in 2018
  • Added on 2018-09-22
• The largest small hexagon
  • Published in 1975
  • Added on 2018-09-22
• The Splitting Algorithm for Egyptian Fractions
  • Published in 1991
  • Added on 2018-09-20
• Mathematical Writing
  • Published in 1987
  • Added on 2018-09-19
• The Namer-Claimer game
  • Published in 2018
  • Added on 2018-09-04
• Charles Babbage's thoughts on notation
  • Published in 1832
  • Added on 2018-09-04
• Euclid's theorem on the infinitude of primes: a historical survey of its proofs (300 B.C.--2017) and another new proof
  • Published in 2012
  • Added on 2018-08-21
• On Some Regular Toroids
  • Published in 2001
  • Added on 2018-07-26
• National Curve Bank
  • Published in 2002
  • Added on 2018-07-02
• How to hear the shape of a billiard table
  • Published in 2018
  • Added on 2018-06-27
• Proof without Words: Fair Allocation of a Pizza
  • Published in 1994
  • Added on 2018-06-26
• When are Multiples of Polygonal Numbers again Polygonal Numbers?
  • Published in 2018
  • Added on 2018-06-25
• A surprisingly simple de Bruijn sequence construction
  • Published in 2016
  • Added on 2018-06-25
• One parameter is always enough
  • Published in 2018
  • Added on 2018-06-06
• Renyi's Parking Problem Revisited
  • Published in 2014
  • Added on 2018-05-21
• Soviet Street Mathematics: Landau’s License Plate Game
  • Published in 2018
  • Added on 2018-05-17
• Neumbering
  • Published in 2018
  • Added on 2018-05-17
• The Rearrangement Number
  • Published in 2016
  • Added on 2018-05-16
• A description of the outer automorphism of \(S_6\), and the invariants of six points in projective space
  • Published in 2008
  • Added on 2018-05-14
• Exact Enumeration of Garden of Eden Partitions
  • Published in 2006
  • Added on 2018-05-13
• How long does it take to catch a wild kangaroo?
  • Published in 2008
  • Added on 2018-05-12
• Math Counterexamples
  • Published in 2014
  • Added on 2018-05-09
• Redefining the integral
  • Published in 2018
  • Added on 2018-05-08
• Most primitive groups have messy invariants
  • Published in 1979
  • Added on 2018-05-06
• An Invitation to Inverse Group Theory
  • Published in 2018
  • Added on 2018-04-19
• The Mathematical Coloring Book
  • Published in 2009
  • Added on 2018-04-18
• Nice Neighbors: A Brief Adventure in Mathematical Gamification
  • Published in 2016
  • Added on 2018-04-17
• The materiality of mathematics: presenting mathematics at the blackboard
  • Published in 2014
  • Added on 2018-04-06
• A Puzzle for Pirates
  • Published in 1999
  • Added on 2018-04-03
• Numeral Systems of the World
  • Published in 2006
  • Added on 2018-03-25
• How do you fix an Oval Track Puzzle?
  • Published in 2016
  • Added on 2018-03-13
• Notable Properties of Specific Numbers
  • Added on 2018-03-05
• almanach ou dictionnaire des nombres - curiosités et propriétés
  • Added on 2018-03-05
• Fingerprint databases for theorems
  • Published in 2013
  • Added on 2018-02-12
• Straight knots
  • Published in 2018
  • Added on 2018-02-01
• Mechanical Computing Systems Using Only Links and Rotary Joints
  • Published in 2018
  • Added on 2018-01-30
• The Muffin Problem
  • Published in 2017
  • Added on 2018-01-30
• The grasshopper problem
  • Published in 2017
  • Added on 2018-01-24
• An empty exercise
  • Published in 1990
  • Added on 2018-01-24
• Playing Games with Algorithms: Algorithmic Combinatorial Game Theory
  • Published in 2001
  • Added on 2018-01-23
• What did Ryser Conjecture?
  • Published in 2018
  • Added on 2018-01-10
• Near Miss Polyhedra
  • Published in 2002
  • Added on 2018-01-10
• Random railways modeled as random 3-regular graphs
  • Published in 1996
  • Added on 2018-01-09
• Any Monotone Boolean Function Can Be Realized by Interlocked Polygons
  • Published in 2010
  • Added on 2018-01-08
• Folding Polyominoes into (Poly)Cubes
  • Published in 2017
  • Added on 2018-01-03
• Spot it(R) Solitaire
  • Published in 2013
  • Added on 2017-12-18
• Mechanisms by Tchebyshev
  • Published in 2009
  • Added on 2017-12-04
• A compilation of LEGO Technic parts to support learning experiments on linkages
  • Published in 2017
  • Added on 2017-12-04
• The game of plates and olives
  • Published in 2017
  • Added on 2017-11-30
• Two-dimensional photonic aperiodic crystals based on Thue-Morse sequence
  • Published in 2007
  • Added on 2017-11-13
• Mathemagics
  • Published in 2000
  • Added on 2017-10-24
• Chocolate games that satisfy the inequality \(y \leq \left \lfloor \frac{z}{k} \right\rfloor\) for \(k=1,2\) and Grundy numbers
  • Published in 2013
  • Added on 2017-10-18
• Curiosities of arithmetic gases
  • Published in 1991
  • Added on 2017-10-16
• The tail does not determine the size of the giant
  • Published in 2017
  • Added on 2017-10-04
• Earliest Uses of Various Mathematical Symbols
  • Published in 2008
  • Added on 2017-09-12
• $H$-supermagic labelings for firecrackers, banana trees and flowers
  • Published in 2016
  • Added on 2017-09-11
• Factoring in the Chicken McNugget monoid
  • Published in 2017
  • Added on 2017-09-06
• Officially, Home Plate doesn’t exist.
  • Published in 2017
  • Added on 2017-08-16
• The Sleeping Beauty Controversy
  • Published in 2017
  • Added on 2017-08-14
• The Bulgarian solitaire and the mathematics around it
  • Published in 2015
  • Added on 2017-08-10
• Frustration solitaire
  • Published in 2007
  • Added on 2017-08-10
• Maximum genus of the generalized Jenga game
  • Published in 2017
  • Added on 2017-08-07
• An unusual cubic representation problem
  • Published in 2014
  • Added on 2017-08-07
• The Curling Number Conjecture
  • Published in 2009
  • Added on 2017-07-31
• Proof of Conway's Lost Cosmological Theorem
  • Published in 1998
  • Added on 2017-07-26
• An Explicit Isometric Reduction of the Unit Sphere into an Arbitrarily Small Ball
  • Published in 2017
  • Added on 2017-07-25
• Avian egg shape: Form, function, and evolution
  • Published in 2017
  • Added on 2017-07-24
• Overcurvature describes the buckling and folding of rings from curved origami to foldable tents
  • Published in 2012
  • Added on 2017-07-20
• Computational complexity and 3-manifolds and zombies
  • Published in 2017
  • Added on 2017-07-13
• Steinhaus Longimeter
  • Published in 2017
  • Added on 2017-07-02
• Polylogarithmic ladders, hypergeometric series and the ten millionth digits of $ζ(3)$ and $ζ(5)$
  • Published in 1998
  • Added on 2017-06-29
• Ununfoldable Polyhedra with Convex Faces
  • Published in 2003
  • Added on 2017-06-26
• The ternary calculating machine of Thomas Fowler
  • Published in 1997
  • Added on 2017-06-22
• Сетунь ВС (Setun Web Simulator)
  • Published in 2017
  • Added on 2017-06-22
• Every positive integer is a sum of three palindromes
  • Published in 2016
  • Added on 2017-06-21
• On the date of Cauchy's contributions to the founding of the theory of groups
  • Published in 1989
  • Added on 2017-06-21
• Graphlopedia
  • Published in 2017
  • Added on 2017-06-21
• Math Magic
  • Published in 1998
  • Added on 2017-06-21
• A Handbook of Mathematical Discourse
  • Published in 2003
  • Added on 2017-06-19
• A formula goes to court: Partisan gerrymandering and the efficiency gap
  • Published in 2017
  • Added on 2017-06-16
• Arithmetical structures on graphs
  • Published in 2016
  • Added on 2017-06-14
• Randomly juggling backwards
  • Published in 2016
  • Added on 2017-06-14
• Arrangements of Stars on the American Flag
  • Published in 2012
  • Added on 2017-06-12
• Cuckoo Filter: Simplification and Analysis
  • Published in 2016
  • Added on 2017-05-23
• The opaque square
  • Published in 2013
  • Added on 2017-05-22
• Homotopy type theory: the logic of space
  • Published in 2017
  • Added on 2017-05-03
• Tropical totally positive matrices
  • Published in 2016
  • Added on 2017-05-02
• On Fibonacci Quaternions
  • Published in 2012
  • Added on 2017-05-02
• PVC Polyhedra
  • Published in 2017
  • Added on 2017-05-02
• No, This is not a Circle
  • Published in 2017
  • Added on 2017-05-02
• The number dictionary
  • Published in 2008
  • Added on 2017-04-12
• Ovals and Egg Curves
  • Published in 2000
  • Added on 2017-04-03
• Approval Voting in Product Societies
  • Published in 2017
  • Added on 2017-03-30
• Pauli Pascal Pyramids, Pauli Fibonacci Numbers, and Pauli Jacobsthal Numbers
  • Published in 2007
  • Added on 2017-03-24
• Jewish Problems
  • Published in 2011
  • Added on 2017-03-23
• Best Laid Plans of Lions and Men
  • Published in 2017
  • Added on 2017-03-22
• Beyond Floating Point: Next-Generation Computer Arithmetic
  • Published in 2017
  • Added on 2017-03-21
• PAPAC-00, a Do-It-Yourself Paper Computer
  • Published in 1958
  • Added on 2017-03-21
• Crazy Sequential Representation: Numbers from 0 to 11111 in terms of Increasing and Decreasing Orders of 1 to 9
  • Published in 2013
  • Added on 2017-03-12
• The mathematics of lecture hall partitions
  • Published in 2016
  • Added on 2017-03-08
• Statistics Done Wrong
  • Published in 2015
  • Added on 2017-03-01
• Three Thoughts on “Prime Simplicity”
  • Published in 2012
  • Added on 2017-02-27
• Prime Simplicity
  • Published in 2009
  • Added on 2017-02-27
• Meaning in Classical Mathematics: Is it at Odds with Intuitionism?
  • Published in 2011
  • Added on 2017-02-27
• On the Existence of Ordinary Triangles
  • Published in 2017
  • Added on 2017-02-06
• Transfinite Version of Welter's Game
  • Published in 2017
  • Added on 2017-02-06
• Plane partitions in the work of Richard Stanley and his school
  • Published in 2015
  • Added on 2017-02-06
• Random Triangles and Polygons in the Plane
  • Published in 2017
  • Added on 2017-02-06
• Analysis of Carries in Signed Digit Expansions
  • Published in 2015
  • Added on 2017-02-06
• Hunting Rabbits on the Hypercube
  • Published in 2017
  • Added on 2017-02-06
• Rules for Folding Polyminoes from One Level to Two Levels
  • Published in 2017
  • Added on 2017-01-16
• Human Inferences about Sequences: A Minimal Transition Probability Model
  • Published in 2016
  • Added on 2017-01-09
• A Singular Mathematical Promenade
  • Published in 2016
  • Added on 2016-12-22
• Balloon Polyhedra
  • Published in 2013
  • Added on 2016-12-21
• Two short proofs of the Perfect Forest Theorem
  • Published in 2016
  • Added on 2016-12-18
• Every natural number is the sum of forty-nine palindromes
  • Published in 2015
  • Added on 2016-12-17
• Sequences of consecutive \(n\)-Niven numbers
  • Published in 1992
  • Added on 2016-12-05
• Quasipractical Numbers
  • Published in 1980
  • Added on 2016-11-28
• Developing a Mathematical Model for Bobbin Lace
  • Published in 2014
  • Added on 2016-11-28
• Cryptographic Protocols with Everyday Objects
  • Published in 2011
  • Added on 2016-11-17
• On the interval containing at least one prime number
  • Published in 1952
  • Added on 2016-11-14
• On subsets with intersections of even cardinality
  • Published in 1969
  • Added on 2016-11-01
• Two remarks on even and oddtown problems
  • Published in 2016
  • Added on 2016-10-27
• Geometric Mechanics of Curved Crease Origami
  • Published in 2012
  • Added on 2016-10-14
• A Space Efficient Algorithm for the Calculation of the Digit Distribution in the Kolakoski Sequence
  • Published in 2011
  • Added on 2016-10-14
• A Discrete and Bounded Envy-Free Cake Cutting Protocol for Any Number of Agents
  • Published in 2016
  • Added on 2016-10-13
• Avoiding Squares and Overlaps Over the Natural Numbers
  • Published in 2009
  • Added on 2016-10-03
• Counting Cases in Marching Cubes: Towards a Generic Algorithm for Producing Substitopes
  • Published in 2003
  • Added on 2016-09-28
• Fractal geometry of a complex plumage trait reveals bird's quality
  • Published in 2013
  • Added on 2016-09-27
• The Nesting and Roosting Habits of The Laddered Parenthesis
  • Published in 1973
  • Added on 2016-09-23
• Programming quantum computers using 3-D puzzles, coffee cups, and doughnuts
  • Published in 2016
  • Added on 2016-09-23
• Historical methods for multiplication
  • Published in 2010
  • Added on 2016-09-22
• Ponytail Motion
  • Published in 2010
  • Added on 2016-09-19
• Seven Puzzles You Think You Must Not Have Heard Correctly
  • Published in 2006
  • Added on 2016-08-30
• Topologically Distinct Sets of Non-intersecting Circles in the Plane
  • Published in 2016
  • Added on 2016-08-25
• Beckett-Gray Codes
  • Published in 2016
  • Added on 2016-08-24
• The general counterfeit coin problem
  • Published in 1995
  • Added on 2016-08-24
• Searching for generalized binary number systems
  • Published in 2017
  • Added on 2016-08-22
• The denominators of convergents for continued fractions
  • Published in 2016
  • Added on 2016-08-06
• Ten Lessons I Wish I Had Learned Before I Started Teaching Differential Equations
  • Published in 1997
  • Added on 2016-08-03
• Matters Computational - Ideas, Algorithms, Source Code
  • Published in 2010
  • Added on 2016-08-03
• Rational Polynomials That Take Integer Values at the Fibonacci Numbers
  • Published in 2016
  • Added on 2016-08-02
• Bad groups in the sense of Cherlin
  • Published in 2016
  • Added on 2016-08-02
• An Irrationality Measure for Regular Paperfolding Numbers
  • Published in 2012
  • Added on 2016-07-11
• What is the smallest prime?
  • Published in 2012
  • Added on 2016-07-05
• How do you compute the midpoint of an interval?
  • Published in 2014
  • Added on 2016-07-04
• Complexity and Completeness of Finding Another solution and its Application to Puzzles
  • Published in 2003
  • Added on 2016-06-18
• Dividing by zero - how bad is it, really?
  • Published in 2016
  • Added on 2016-06-17
• Fuzzy plane geometry I: Points and lines
  • Published in 1997
  • Added on 2016-06-17
• Continued Logarithms And Associated Continued Fractions
  • Published in 2016
  • Added on 2016-06-15
• Dr Mitchill and the Mathematical Tetrodon
  • Published in 2015
  • Added on 2016-06-13
• The snail lemma
  • Published in 2016
  • Added on 2016-06-13
• Notes on the Fourth Dimension
  • Published in 2015
  • Added on 2016-06-13
• Photoelectric Number Sieve Machine ("Gear Machine")
  • Published in 1932
  • Added on 2016-06-13
• Challenging mathematical problems with elementary solutions
  • Published in 1964
  • Added on 2016-06-08
• On Pellegrino's 20-Caps in $S_{4,3}$
  • Published in 1983
  • Added on 2016-06-01
• Counting groups: gnus, moas and other exotica
  • Published in 2008
  • Added on 2016-05-20
• Fibonacci Jigsaw Puzzle
  • Published in 2016
  • Added on 2016-05-19
• Dismal Arithmetic
  • Published in 2011
  • Added on 2016-05-19
• Two notes on notation
  • Published in 1992
  • Added on 2016-05-19
• On the Cookie Monster Problem
  • Published in 2013
  • Added on 2016-05-19
• Prime numbers in certain arithmetic progressions
  • Published in 2001
  • Added on 2016-05-07
• Division by zero
  • Published in 2016
  • Added on 2016-04-26
• Transposable integers in arbitrary bases
  • Published in 1985
  • Added on 2016-04-19
• A Dozen Hat Problems
  • Published in 2009
  • Added on 2016-04-12
• De Bruijn's Combinatorics
  • Published in 2012
  • Added on 2016-02-05
• Comparative kinetics of the snowball respect to other dynamical objects
  • Published in 2003
  • Added on 2016-01-18
• On gardeners, dukes and mathematical instruments
  • Published in 2015
  • Added on 2016-01-18
• Area and Hausdorff Dimension of Julia Sets of Entire Functions
  • Published in 1987
  • Added on 2015-12-17
• Approaches to the Enumerative Theory of Meanders
  • Published in 2003
  • Added on 2015-12-14
• The Theory of Heaps and the Cartier-Foata Monoid
  • Published in 2006
  • Added on 2015-12-03
• Planar graph is on fire
  • Published in 2015
  • Added on 2015-12-02
• What to do when the trisector comes
  • Published in 1983
  • Added on 2015-11-30
• On the Number of Times an Integer Occurs as a Binomial Coefficient
  • Published in 1974
  • Added on 2015-11-30
• When is .999... less than 1?
  • Published in 2010
  • Added on 2015-11-19
• The effective content of Reverse Nonstandard Mathematics and the nonstandard content of effective Reverse Mathematics
  • Published in 2015
  • Added on 2015-11-19
• Haruspicy and anisotropic generating functions
  • Published in 2003
  • Added on 2015-11-08
• Spiralling self-avoiding walks: an exact solution
  • Published in 1984
  • Added on 2015-11-08
• Haruspicy 3: The anisotropic generating function of directed bond-animals is not D-finite
  • Published in 2006
  • Added on 2015-11-08
• How to Beat Your Wythoff Games' Opponent on Three Fronts
  • Published in 1982
  • Added on 2015-10-23
• Dice - Numericana
  • Published in 2000
  • Added on 2015-10-17
• Proposal to Encode the Ganda Currency Mark for Bengali in ISO/IEC 10646
  • Published in 2007
  • Added on 2015-09-30
• Another Proof of Segre's Theorem about Ovals
  • Published in 2013
  • Added on 2015-09-29
• Fair Dice
  • Published in 1989
  • Added on 2015-09-15
• On the Existence of Generalized Parking Spaces for Complex Reflection Groups
  • Published in 2015
  • Added on 2015-09-06
• Mind the Croc! Rationality Gaps vis-à-vis the Crocodile Paradox
  • Published in 2015
  • Added on 2015-09-03
• Denser Egyptian Fractions
  • Published in 1998
  • Added on 2015-07-23
• Reversible quantum cellular automata
  • Published in 2004
  • Added on 2015-06-28
• Representations of Palindromic, Prime and Number Patterns
  • Published in 2015
  • Added on 2015-06-12
• Have you been using the wrong estimator? These guys bound average fidelity using this one weird trick von Neumann didn't want you to know
  • Published in 2015
  • Added on 2015-03-26
• The Lost Calculus (1637-1670): Tangency and Optimization without Limits
  • Published in 2005
  • Added on 2015-03-12
• The accuracy of Buffon's needle: a rule of thumb used by ants to estimate area
  • Published in 2001
  • Added on 2015-03-09
• Finding long chains in kidney exchange using the traveling salesman problem
  • Published in 2015
  • Added on 2015-03-07
• Maximum Matching and a Polyhedron With 0,1-Vertices
  • Published in 1964
  • Added on 2015-03-07
• On Legendre's Prime Number Formula
  • Published in 1980
  • Added on 2015-03-06
• Magic squares of seventh powers
  • Published in 2004
  • Added on 2015-03-06
• A Brief Critique of Pure Hypercomputation
  • Published in 2009
  • Added on 2015-03-05
• Complexity and Algorithms for Graph and Hypergraph Sandwich Problems
  • Published in 1998
  • Added on 2015-02-24
• A combinatorial theorem in plane geometry
  • Published in 1975
  • Added on 2015-02-23
• The dying rabbit problem revisited
  • Published in 2007
  • Added on 2015-02-18
• Efficient Algorithms for Zeckendorf Arithmetic
  • Published in 2012
  • Added on 2015-02-16
• Rational approximations to $\pi$ and some other numbers
  • Published in 1993
  • Added on 2015-02-16
• Exact Approximations of Omega Numbers
  • Published in 2006
  • Added on 2015-02-03
• Enumeration of symmetry classes of convex polyominoes on the honeycomb lattice
  • Published in 2005
  • Added on 2015-02-02
• On dice and coins: Models of computation for random generation
  • Published in 1993
  • Added on 2015-01-26
• This is the (co)end, my only (co)friend
  • Published in 2015
  • Added on 2015-01-13
• The Eudoxus Real Numbers
  • Published in 2004
  • Added on 2015-01-07
• Bells, Motels and Permutation Groups
  • Published in 2012
  • Added on 2014-12-17
• Music: a Mathematical Offering
  • Published in 2006
  • Added on 2014-12-02
• Irrationality From The Book
  • Published in 2009
  • Added on 2014-12-01
• How not to prove the Poincaré conjecture
  • Published in 1966
  • Added on 2014-11-17
• Division by three
  • Published in 2006
  • Added on 2014-11-17
• Solving Triangular Peg Solitaire
  • Published in 2007
  • Added on 2014-11-10
• An Application of Elementary Group Theory to Central Solitaire
  • Published in 1998
  • Added on 2014-11-10
• The Super Patalan Numbers
  • Published in 2014
  • Added on 2014-10-23
• The Misfortunes of a Trio of Mathematicians Using Computer Algebra Systems. Can We Trust in Them?
  • Published in 2014
  • Added on 2014-10-23
• Proofs without syntax
  • Published in 2006
  • Added on 2014-10-09
• Methods for studying coincidences
  • Published in 2006
  • Added on 2014-10-07
• Sudoku, gerechte designs, resolutions, affine space, spreads, reguli, and Hamming codes
  • Published in 2008
  • Added on 2014-10-02
• How often should you clean your room?
  • Published in 2013
  • Added on 2014-09-02
• Pondering an Artist's Perplexing Tribute to the Pythagorean Theorem
  • Published in 2009
  • Added on 2014-08-28
• A Fresh Look at Peg Solitaire
  • Published in 2007
  • Added on 2014-08-26
• The shape of a Mobius band
  • Published in 1993
  • Added on 2014-08-20
• Foldings and Meanders
  • Published in 2013
  • Added on 2014-08-19
• Mathematics and group theory in music
  • Published in 2014
  • Added on 2014-07-24
• An arctic circle theorem for groves
  • Published in 2004
  • Added on 2014-07-01
• History-dependent random processes
  • Published in 2008
  • Added on 2014-06-30
• LIM is not slim
  • Published in 2013
  • Added on 2014-06-11
• The Number-Pad Game
  • Published in 2007
  • Added on 2014-06-11
• Nim Fractals
  • Published in 2014
  • Added on 2014-06-05
• Generalizing Zeckendorf's Theorem to f-decompositions
  • Published in 2013
  • Added on 2014-04-28
• Useful inequalities cheat sheet
  • Published in 2011
  • Added on 2014-04-28
• A Mathematical Coloring Book
  • Published in 2009
  • Added on 2014-04-24
• On the diagram of 132-avoiding permutations
  • Published in 2003
  • Added on 2014-03-31
• A number system with an irrational base
  • Published in 1957
  • Added on 2014-03-12
• Eponymy in Mathematical Nomenclature: What's in a Name, and What Should Be?
  • Published in 1980
  • Added on 2014-02-11
• Table for Fundamentals of Series : Part I : Basic Properties of Series and Products
  • Published in 2011
  • Added on 2014-02-11
• More ties than we thought
  • Published in 2014
  • Added on 2014-02-06
• Mathematical Games
  • Published in 2007
  • Added on 2014-01-24
• Rithmomachia
  • Published in 1984
  • Added on 2014-01-24
• Linear recurrences through tilings and Markov chains
  • Published in 2003
  • Added on 2014-01-21
• The Stick Problem
  • Published in 2013
  • Added on 2014-01-13
• Circular orbits on a warped spandex fabric
  • Published in 2013
  • Added on 2014-01-07
• The topology of competitively constructed graphs
  • Published in 2013
  • Added on 2013-12-30
• The mathematics of Septoku
  • Published in 2008
  • Added on 2013-12-22
• Fair but irregular polyhedral dice
  • Published in 2010
  • Added on 2013-12-16
• Solving Differential Equations by Symmetry Groups
  • Published in 2007
  • Added on 2013-12-06
• A knowledge-based approach of connect-four
  • Published in 1988
  • Added on 2013-12-03
• WHAT IS Lehmer's number?
  • Published in 2009
  • Added on 2013-12-03
• Analyse algébrique d'un scrutin
  • Published in 1963
  • Added on 2013-12-01
• Lone Axes in Outer Space
  • Published in 2013
  • Added on 2013-11-29
• The Maximum Throughput Rate for Each Hole on a Golf Course
  • Published in 2015
  • Added on 2013-11-25
• Wolstenholme's theorem: Its Generalizations and Extensions in the last hundred and fifty years (1862--2012)
  • Published in 2011
  • Added on 2013-11-21
• The Math Encyclopedia of Smarandache Type Notions
  • Published in 2013
  • Added on 2013-11-21
• 2178 And All That
  • Published in 2013
  • Added on 2013-11-20
• Fibonacci numbers and Leonardo numbers
  • Published in 1981
  • Added on 2013-11-19
• Pancake Flipping is Hard
  • Published in 2011
  • Added on 2013-11-15
• Giuga Numbers and the arithmetic derivative
  • Published in 2011
  • Added on 2013-11-15
• Swiss cheeses, rational approximation and universal plane curves
  • Published in 2010
  • Added on 2013-11-14
• Playing pool with $\pi$ (the number $\pi$ from a billiard point of view)
  • Published in 2003
  • Added on 2013-11-14
• Random Structures from Lego Bricks and Analog Monte Carlo Procedures
  • Published in 2013
  • Added on 2013-11-13
• Is POPL Mathematics or Science?
  • Published in 1992
  • Added on 2013-11-06
• Proofs by Descent
  • Published in 2010
  • Added on 2013-11-04
• Practical numbers
  • Published in 1948
  • Added on 2013-10-31
• How to differentiate a number
  • Published in 2003
  • Added on 2013-10-31
• The Ubiquitous Thue-Morse Sequence
  • Published in 2006
  • Added on 2013-10-21
• Sloane's Gap: Do Mathematical and Social Factors Explain the Distribution of Numbers in the OEIS?
  • Published in 2011
  • Added on 2013-10-17
• Cookie Monster Devours Naccis
  • Published in 2013
  • Added on 2013-10-09
• Perfect Matchings and the Octahedron Recurrence
  • Published in 2004
  • Added on 2013-10-09
• An Infinite Set of Heron Triangles with Two Rational Medians
  • Published in 2013
  • Added on 2013-10-09
• The Laurent phenomenon
  • Published in 2001
  • Added on 2013-10-09
• The Strange and Surprising Saga of the Somos Sequences
  • Published in 1991
  • Added on 2013-10-09
• On n-Dimensional Polytope Schemes
  • Published in 2013
  • Added on 2013-08-02
• Only problems, not solutions!
  • Published in 1991
  • Added on 2013-07-29
• From Unicode to Typography, a Case Study the Greek Script
  • Published in 1999
  • Added on 2013-07-22
• Half of a coin: negative probabilities
  • Published in 2005
  • Added on 2013-07-17
• Smooth neighbors
  • Published in 2012
  • Added on 2013-07-11
• On a problem of Störmer
  • Published in 1964
  • Added on 2013-07-11
• Missing Data: Instrument-Level Heffalumps and Item-Level Woozles
  • Published in 1999
  • Added on 2013-06-26
• Pascal's Pyramid Or Pascal's Tetrahedron
  • Published in 1990
  • Added on 2013-06-25
• A Line of Sages
  • Published in 2013
  • Added on 2013-06-20
• Non-sexist solution of the ménage problem
  • Published in 1985
  • Added on 2013-06-16
• The Ubiquitous Pi
  • Published in 2013
  • Added on 2013-06-11
• Six Ways to Sum a Series
  • Published in 1994
  • Added on 2013-06-10
• Using Monoidal Categories in the Transformational Study of Musical Time-Spans and Rhythms
  • Published in 2013
  • Added on 2013-06-02
• Kindergarten Quantum Mechanics
  • Published in 2005
  • Added on 2013-05-28
• Cyclic twill-woven objects
  • Published in 2011
  • Added on 2013-05-16
• Division of labor in child care: A game-theoretic approach
  • Published in 2013
  • Added on 2013-05-07
• A Do-It-Yourself Paper Digital Computer, 1959.
  • Published in 2010
  • Added on 2013-05-05
• Familial sinistrals avoid exact numbers.
  • Published in 2013
  • Added on 2013-04-15
• Circuitry in 3D chess
  • Published in 2013
  • Added on 2013-04-03
• The urinal problem
  • Published in 2010
  • Added on 2013-03-28
• A Smaller Sleeping Bag For A Baby Snake
  • Published in 1998
  • Added on 2013-03-20
• Constructing the Tits ovoid from an elliptic quadric
  • Published in 2006
  • Added on 2013-03-19
• Das 2: 3-Ei-ein praktikables Eimodell
  • Published in 2009
  • Added on 2013-03-19
• Problems to sharpen the young
  • Published in 1992
  • Added on 2013-03-18
• Review of "Groups" by Georges Papy in New Scientist
  • Published in 1964
  • Added on 2013-03-17
• The Circle-Squaring Problem Decomposed
  • Published in 2009
  • Added on 2013-03-17
• Zeroless Arithmetic: Representing Integers ONLY using ONE
  • Published in 2013
  • Added on 2013-03-07
• Circular reasoning: who first proved that $C/d$ is a constant?
  • Published in 2013
  • Added on 2013-03-06
• Embedding countable groups in 2-generator groups
  • Published in 1993
  • Added on 2013-02-19
• The Muddy Children : A logic for public announcement
  • Published in 2007
  • Added on 2013-02-19
• What are some of the most ridiculous proofs in mathematics?
  • Published in 2012
  • Added on 2013-02-17
• Markets are efficient if and only if P = NP
  • Published in 2011
  • Added on 2013-02-11
• Conway's Rational Tangles
  • Published in 2012
  • Added on 2013-02-06
• A note on paradoxical metric spaces
  • Published in 2004
  • Added on 2013-01-26
• Incorporating Voice Permutations into the Theory of Neo-Riemannian Groups and Lewinian Duality
  • Published in 2013
  • Added on 2013-01-21
• Delay can stabilize: Love affairs dynamics
  • Published in 2012
  • Added on 2013-01-19
• Algorithmic self-assembly of DNA Sierpinski triangles.
  • Published in 2004
  • Added on 2013-01-18
• Invited commentary: the perils of birth weight--a lesson from directed acyclic graphs.
  • Published in 2006
  • Added on 2013-01-02
• The paramagnetic and glass transitions in sudoku
  • Published in 2012
  • Added on 2012-12-29
• Figures for "Impossible fractals"
  • Published in 2008
  • Added on 2012-12-18
• Biologically Unavoidable Sequences
  • Published in 2012
  • Added on 2012-12-16
• How to eat 4/9 of a pizza
  • Published in 2011
  • Added on 2012-12-12
• A stratification of the space of all $k$-planes in $\mathbb{C}_n$
  • Published in 2012
  • Added on 2012-11-19
• Conway's Wizards
  • Published in 2012
  • Added on 2012-11-03
• Picture-Hanging Puzzles
  • Published in 2012
  • Added on 2012-11-03
• Papy's Minicomputer
  • Published in 1970
  • Added on 2012-10-31
• The lost squares of Dr. Franklin: Ben Franklin's missing squares and the secret of the magic circle
  • Published in 2001
  • Added on 2012-10-30
• On sphere-filling ropes
  • Published in 2010
  • Added on 2012-10-29
• Algebraic theory of Penrose's non-periodic tilings of the plane
  • Published in 1981
  • Added on 2012-10-13
• Earliest Uses of Symbols of Calculus
  • Published in 2008
  • Added on 2012-10-09
• The topology of the minimal regular cover of the Archimedean tessellations
  • Published in 2012
  • Added on 2012-10-05
• Twin Towers of Hanoi
  • Published in 2011
  • Added on 2012-09-28
• Online Dating Recommender Systems: The Split-complex Number Approach
  • Published in 2012
  • Added on 2012-09-13
• Magic: the Gathering is Turing Complete
  • Published in 2012
  • Added on 2012-09-11
• How Java's floating-point hurts everyone everywhere
  • Published in 1998
  • Added on 2012-09-05
• Beastly Numbers
  • Published in 1996
  • Added on 2012-09-05
• Modified Pascal Triangle and Pascal Surfaces
  • Published in 2012
  • Added on 2012-09-05
• A Hamiltonian circuit for Rubik's Cube
  • Published in 2012
  • Added on 2012-09-04
• Mastermind is NP-Complete
  • Published in 2005
  • Added on 2012-09-02
• How far can Tarzan jump?
  • Published in 2012
  • Added on 2012-09-02
• VIP-club phenomenon: emergence of elites and masterminds in social networks
  • Published in 2005
  • Added on 2012-09-02
• The Canonical Basis of $\dot{\mathbf{U}}$ for Type $A_{2}$
  • Published in 2012
  • Added on 2012-08-29
• The Fastest and Shortest Algorithm for All Well-Defined Problems
  • Published in 2002
  • Added on 2012-08-14
• A New Rose : The First Simple Symmetric 11-Venn Diagram
  • Published in 2012
  • Added on 2012-08-09
• The usefulness of useless knowledge
  • Published in 1939
  • Added on 2012-07-16
• Seven Staggering Sequences
  • Published in 2006
  • Added on 2012-07-14
• The top ten prime numbers
  • Published in 2001
  • Added on 2012-06-28
• Train Sets
  • Published in 1994
  • Added on 2012-06-25
• Equilibrium solution to the lowest unique positive integer game
  • Published in 2010
  • Added on 2012-06-22
• The wobbly garden table
  • Published in 2001
  • Added on 2012-06-17
• A cohomological viewpoint on elementary school arithmetic
  • Published in 2002
  • Added on 2012-06-14
• On distributions computable by random walks on graphs
  • Published in 2004
  • Added on 2012-06-07
• To Dissect a Mockingbird: A Graphical Notation for the Lambda Calculus with Animated Reduction
  • Published in 1996
  • Added on 2012-06-03
• Topology Explains Why Automobile Sunshades Fold Oddly
  • Published in 2012
  • Added on 2012-05-23
• On an error in the star puzzle by Henry E. Dudeney
  • Published in 2012
  • Added on 2012-05-22
• How to recognise a 4-ball when you see one
  • Published in 2011
  • Added on 2012-05-19
• G2 and the Rolling Ball
  • Published in 2012
  • Added on 2012-05-14
• Lectures on lost mathematics
  • Published in 2010
  • Added on 2012-05-10
• Estimating the Effect of the Red Card in Soccer
  • Published in 2009
  • Added on 2012-05-09
• A categorical foundation for Bayesian probability
  • Published in 2012
  • Added on 2012-05-08
• Survey on fusible numbers
  • Published in 2012
  • Added on 2012-05-02
• Cardinal arithmetic for skeptics
  • Published in 1992
  • Added on 2012-05-02
• A mathematician's survival guide
  • Published in 2012
  • Added on 2012-04-29
• Calculus Made Easy
  • Published in 1914
  • Added on 2012-04-26
• Long finite sequences
  • Published in 1998
  • Added on 2012-04-24
• Computer analysis of Sprouts with nimbers
  • Published in 2010
  • Added on 2012-04-21
• Nim multiplication
  • Published in 1978
  • Added on 2012-04-21
• Theory and History of Geometric Models
  • Published in 2007
  • Added on 2012-04-15
• Robust Soldier Crab Ball Gate
  • Published in 2011
  • Added on 2012-04-15
• Statistical Modeling of Gang Violence in Los Angeles
  • Published in 2010
  • Added on 2012-04-13
• High Primes and Misdemeanours: Lectures in Honour of the 60th Birthday of Hugh Cowie Williams
  • Published in 2004
  • Added on 2012-04-12
• Cellular automata in the hyperbolic plane: proposal for a new environment
  • Published in 2004
  • Added on 2012-04-08
• Light reflecting off Christmas-tree balls
  • Published in 2010
  • Added on 2012-04-08
• Cake Cutting Mechanisms
  • Published in 2012
  • Added on 2012-04-07
• The Euler spiral: a mathematical history
  • Published in 2008
  • Added on 2012-04-07
• Navigating Hyperbolic Space with Fibonacci Trees
  • Published in 2010
  • Added on 2012-04-07
• Undecidable problems: a sampler
  • Published in 2012
  • Added on 2012-04-04
• The mate-in-n problem of infinite chess is decidable
  • Published in 2012
  • Added on 2012-03-28
• Statistical Laws Governing Fluctuations in Word Use from Word Birth to Word Death
  • Published in 2011
  • Added on 2012-03-27
• The bitangent sphere problem
  • Published in 1990
  • Added on 2012-03-24
• Gaussian prime spirals
  • Published in 2012
  • Added on 2012-03-24
• Topic-based vector space model
  • Published in 2003
  • Added on 2012-03-24
• A New Approximation to $\pi$ (Conclusion)
  • Published in 1948
  • Added on 2012-03-14
• Doc, What Are My Chances?
  • Published in 2011
  • Added on 2012-03-11
• Random walks reaching against all odds the other side of the quarter plane
  • Published in 2011
  • Added on 2012-03-01
• Quotients Homophones des Groupes Libres Homophonic Quotients of Free Groups
  • Published in 1986
  • Added on 2012-02-27
• Poe, E.: Near A Raven
  • Published in 1995
  • Added on 2012-02-25
• Barcodes: the persistent topology of data
  • Published in 2008
  • Added on 2012-02-23
• Further evidence for addition and numerical competence by a Grey parrot (Psittacus erithacus)
  • Published in 2012
  • Added on 2012-02-21
• Passage to the limit in Proposition I, Book I of Newton's Principia
  • Published in 2003
  • Added on 2012-02-15
• Orange Peels and Fresnel Integrals
  • Published in 2012
  • Added on 2012-02-15
• Tropical Mathematics
  • Published in 2004
  • Added on 2012-02-12
• Fractions without Quotients: Arithmetic of Repeating Decimals
  • Published in 1978
  • Added on 2012-02-10
• Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory, and N. Bosworth assisted by other gentlemen of eminence
  • Published in 1819
  • Added on 2012-02-10
• Nineteen dubious ways to compute the exponential of a matrix, twenty-five years later
  • Published in 2003
  • Added on 2012-02-09
• Fibonacci determinants-a combinatorial approach
  • Published in 2007
  • Added on 2012-02-08
• Good stories, pity they're not true
  • Published in 2004
  • Added on 2012-02-08
• Benjamin Peirce and the Howland will
  • Published in 1980
  • Added on 2012-02-07
• Mapping an unfriendly subway system
  • Published in 2010
  • Added on 2012-02-07
• Cryptographic and Physical Zero-Knowledge Proof Systems for Solutions of Sudoku Puzzles
  • Published in 2007
  • Added on 2012-02-07
• In retrospect: On the Six-Cornered Snowflake
  • Published in 2011
  • Added on 2012-02-06
• Tropical Arithmetic and Tropical Matrix Algebra
  • Published in 2005
  • Added on 2012-02-03
• Gerrymandering and Convexity
  • Published in 2010
  • Added on 2012-02-03
• Continued fractions constructed from prime numbers
  • Published in 2010
  • Added on 2012-02-01
• Gaming is a hard job, but someone has to do it!
  • Published in 2012
  • Added on 2012-01-27
• Compositional Reasoning Using Intervals and Time Reversal
  • Published in 2011
  • Added on 2012-01-27
• The hardness of the Lemmings game, or Oh no, more NP-completeness proofs
  • Published in 2004
  • Added on 2012-01-27
• London Calling Philosophy and Engineering: WPE 2008
  • Published in 2009
  • Added on 2012-01-24
• The Snowblower Problem
  • Published in 2006
  • Added on 2012-01-22
• Scooping the Loop Snooper
  • Published in 2000
  • Added on 2012-01-20
• Ethnomathematics as a new research field , illustrated by studies of mathematical ideas in African history
  • Published in 2000
  • Added on 2012-01-19
• Drawings from Angola: living mathematics
  • Published in 2007
  • Added on 2012-01-19
• Understanding Monads With JavaScript
  • Published in 2011
  • Added on 2012-01-18
• The Collatz Fractal
  • Published in 2012
  • Added on 2012-01-15
• Analysis of Casino Shelf Shuffling Machines
  • Published in 2011
  • Added on 2012-01-11
• A zero-knowledge Poker protocol that achieves confidentiality of the players' strategy or How to achieve an electronic Poker face
  • Published in 1987
  • Added on 2012-01-10
• A Generalized Fibonacci LSB Data Hiding Technique
  • Published in 2006
  • Added on 2012-01-10
• Computer evolution of buildable objects
  • Published in 1999
  • Added on 2012-01-09
• Random Walks on Finite Groups
  • Published in 2004
  • Added on 2012-01-05
• Complexity of Langton's ant
  • Published in 2002
  • Added on 2012-01-04
• On badly approximable numbers and certain games
  • Published in 1966
  • Added on 2012-01-04
• Three-dimensional finite point groups and the symmetry of beaded beads
  • Published in 2007
  • Added on 2012-01-04
• Carrots for dessert
  • Published in 2010
  • Added on 2012-01-02
• How to Gamble If You're In a Hurry
  • Published in 2011
  • Added on 2011-12-15
• Origami Burrs and Woven Polyhedra
  • Published in 2000
  • Added on 2011-12-14
• Deobfuscation is in NP
  • Published in 2002
  • Added on 2011-12-12
• Tie knots, random walks and topology
  • Published in 2000
  • Added on 2011-12-09
• What Are the Odds?
  • Published in 1919
  • Added on 2011-12-09
• Designing tie knots by random walks
  • Published in 1999
  • Added on 2011-12-09
• Asymptotic statistics of the n-sided planar Poisson–Voronoi cell: I. Exact results
  • Published in 2005
  • Added on 2011-12-08
• Laying train tracks
  • Published in 2011
  • Added on 2011-12-03
• Tetris is Hard, Even to Approximate
  • Published in 2008
  • Added on 2011-11-23
• Remainder Wheels and Group Theory
  • Published in 2008
  • Added on 2011-11-02
• Chalk: Materials and Concepts in Mathematics Research
  • Published in 2011
  • Added on 2011-11-01
• The experimental effectiveness of mathematical proof
  • Published in 2007
  • Added on 2011-10-30
• Scholarly communication in transition: The use of question marks in the titles of scientific articles in medicine, life sciences and physics 1966–2005
  • Published in 2009
  • Added on 2011-10-14
• Baron Munchhausen Redeems Himself : Bounds for a Coin-Weighing Puzzle Background
  • Published in 2010
  • Added on 2011-10-14
• Cool irrational numbers and their rather cool rational approximations
  • Published in 2003
  • Added on 2011-10-13
• A linear programming approach for aircraft boarding strategy
  • Published in 2007
  • Added on 2011-10-04
• The elasto-plastic indentation of a half-space by a rigid sphere
  • Published in 1971
  • Added on 2011-10-02
• Gödel's Second Incompleteness Theorem Explained in Words of One Syllable
  • Published in 1994
  • Added on 2011-09-24
• Fusible Numbers
  • Published in 2010
  • Added on 2011-09-21
• There is no "Uspensky's method"
  • Published in 1986
  • Added on 2011-09-15
• Mad Abel : A card game for 2 + players
  • Published in 2006
  • Added on 2011-09-13
• Shamos's Catalog of the Real Numbers
  • Published in 2011
  • Added on 2011-09-08
• Does Quantum Interference exist in Twitter?
  • Published in 2011
  • Added on 2011-09-08
• Packing circles and spheres on surfaces
  • Published in 2009
  • Added on 2011-09-04
• Irrationality from the book
  • Published in 2009
  • Added on 2011-08-29
• Against Conditionalization
  • Published in 1995
  • Added on 2011-08-28
• Investigations of Game of Life cellular automata rules on Penrose Tilings : lifetime and ash statistics
  • Published in 2010
  • Added on 2011-08-14
• Doubly-, triply-, quadruply- and quintuply-innervated crustacean muscles
  • Published in 1939
  • Added on 2011-08-09
• Gödel's incompleteness theorem
  • Published in 1994
  • Added on 2011-06-01
• Penrose's Godelian argument
  • Published in 1996
  • Added on 2011-05-16
• Deriving Uniform Polyhedra with Wythoff's Construction
  • Published in 2010
  • Added on 2011-05-10
• Testing Petri Nets for Mobile Robots Using Gröbner Bases
  • Published in 2000
  • Added on 2011-05-09
• Accurate estimation of forward path geometry using two-clothoid road model
  • Published in 2002
  • Added on 2011-04-12
• The 1-Hyperbolic Projection for User Interfaces
  • Published in 2003
  • Added on 2011-04-12
• Drawing and Labeling High-Quality Metro Maps by Mixed-Integer Programming.
  • Published in 2010
  • Added on 2011-04-07
• A Paradoxical Property of the Monkey Book
  • Published in 2011
  • Added on 2011-04-03
• An example of a computable absolutely normal number
  • Published in 2002
  • Added on 2011-03-28
• A Note on Approximating the Normal Distribution Function
  • Published in 2008
  • Added on 2011-03-28
• Theoretical Computer Science Cheat Sheet
  • Published in 2003
  • Added on 2011-03-26
• Tree automata techniques and applications
  • Published in 1997
  • Added on 2011-03-25
• Automatic calculation of plane loci using Grobner bases and integration into a Dynamic Geometry System
  • Published in 2010
  • Added on 2011-03-24
• Juggling Probabilities
  • Published in 2009
  • Added on 2011-03-20
• The isoperimetric problem
  • Published in 2001
  • Added on 2011-03-14
• Hierarchical Position Based Dynamics
  • Published in 2008
  • Added on 2011-03-11
• James Garfield's Proof of the Pythagorean Theorem
  • Published in 2008
  • Added on 2011-02-18
• Surreal Numbers – An Introduction
  • Published in 2005
  • Added on 2011-02-16
• A discursive grammar for customizing mass housing: the case of Siza's houses at Malagueira
  • Published in 2005
  • Added on 2011-02-15
• Hypercomputation: computing more than the Turing machine
  • Published in 2002
  • Added on 2011-02-09
• Comparison of geometric figures
  • Published in 2008
  • Added on 2011-02-03
• On a curious property of 3435
  • Published in 2009
  • Added on 2011-02-02
• Better approximations to cumulative normal functions
  • Published in 2002
  • Added on 2011-01-22
• Continued fraction algorithms, functional operators, and structure constants
  • Published in 1998
  • Added on 2011-01-20
• A classification for shaggy dog stories
  • Published in 1963
  • Added on 2011-01-12
• On Buffon Machines and Numbers
  • Published in 2011
  • Added on 2011-01-12
• Four questions about fuzzy rankings
  • Published in 2010
  • Added on 2011-01-12
• A history of mathematical notations
  • Published in 1993
  • Added on 2011-01-12
• Interpolating Solid Orientations with a $C^2$ -Continuous B-Spline Quaternion Curve
  • Published in 2007
  • Added on 2011-01-12
• Can One Hear the Shape of a Drum?
  • Published in 1966
  • Added on 2011-01-12
• Animating rotation with quaternion curves
  • Published in 1985
  • Added on 2011-01-12
• Spontaneous knotting of an agitated string.
  • Published in 2007
  • Added on 2011-01-12
• Zaphod Beeblebrox's Brain and the Fifty-ninth Row of Pascal's Triangle
  • Published in 1992
  • Added on 2010-10-31
• Implications of the Turing Completeness of Reaction-Diffusion Models, informed by GPGPU simulations on an XBox 360: Cardiac Arrythmias, Re-entry and the Halting Problem
  • Published in 2008
  • Added on 2010-09-30
• openttd logic gates
  • Published in 2005
  • Added on 2010-09-30
• Push-pull LEGO logic gates
  • Published in 1999
  • Added on 2010-09-30
• Misconceptions about the Golden Ratio
  • Published in 1992
  • Added on 2010-09-29
• On Furstenberg's Proof of the Infinitude of Primes
  • Published in 2009
  • Added on 2010-09-09
• What symmetry groups are present in the Alhambra?
  • Published in 2006
  • Added on 2010-09-06
• The Origin of Chemical Elements
  • Published in 1948
  • Added on 2010-09-03
• The role of instrumental and relational understanding in proofs about group isomorphisms
  • Published in 2002
  • Added on 2010-09-03
• A Note on Boolos' Proof of the Incompleteness Theorem
  • Published in 1994
  • Added on 2010-09-03
• A Closed-Form Algorithm for Converting Hilbert Space-Filling Curve Indices
  • Published in 2010
  • Added on 2010-09-01
• Digital halftoning with space filling curves
  • Published in 1991
  • Added on 2010-08-31
• Hilbert R-tree: An improved R-tree using fractals
  • Published in 1994
  • Added on 2010-08-31
• A game for budding knot theorists
  • Published in 2010
  • Added on 2010-08-25
• On Mathematics and Mathematicians
  • Published in 2008
  • Added on 2010-08-24
• Detection of transposition errors in decimal numbers
  • Published in 1967
  • Added on 2010-08-20
• Circle Packing for Origami Design Is Hard
  • Published in 2010
  • Added on 2010-08-13
• What Sequential Games , the Tychonoff Theorem and the Double-Negation Shift have in Common
  • Published in 2010
  • Added on 2010-08-04
• The Mathematics of Musical Instruments
  • Published in 2001
  • Added on 2010-07-24
• A combinatorial approach to sums of two squares and related problems
  • Published in 2002
  • Added on 2010-07-16
• Constructive gem: juggling exponentials
  • Published in 2009
  • Added on 2010-07-15
• ‘Knowable' As ‘Known After an Announcement'
  • Published in 2008
  • Added on 2010-06-26
• Foolproof : A Sampling of Mathematical Folk Humor
  • Published in 2005
  • Added on 2010-06-18
• A formal system for Euclid's Elements
  • Published in 2008
  • Added on 2010-04-04
• An aperiodic hexagonal tile
  • Published in 2010
  • Added on 2010-03-26
• How to explain zero-knowledge protocols to your children
  • Published in 1989
  • Added on 2010-03-24
• Plane recursive trees, Stirling permutations and an urn model
  • Published in 2008
  • Added on 2010-02-25
• Unbounded spigot algorithms for the digits of pi
  • Published in 2006
  • Added on 2010-01-05

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