The Mathematical Coloring Book
Article by Alexander Soifer
In collection: Attention-grabbing titles
Due to the author's correspondence with Van der Waerden, Erdös, Baudet, members of the Schur Circle, and others, and due to voluminous archival materials uncovered by the author over 18 years of his work on the book, this book contains material that...

A Brief Critique of Pure Hypercomputation
Article by Cotogno, Paolo
In collection: Basically computer science

Invited commentary: the perils of birth weight--a lesson from directed acyclic graphs.
Article by Wilcox, Allen J
In collections: Easily explained, Probability and statistics
The strong association of birth weight with infant mortality is complicated by a paradoxical finding: Small babies in high-risk populations usually have lower risk than small babies in low-risk populations....
URL: ncbi.nlm.nih.gov/pubmed/169315

Enumeration of m-ary cacti
Article by Miklos Bona and Michel Bousquet and Gilbert Labelle and Pierre Leroux
In collections: Attention-grabbing titles, Combinatorics, Things to make and do
The purpose of this paper is to enumerate various classes of cyclically colored m-gonal plane cacti, called m-ary cacti. This combinatorial problem...
URL: arxiv.org/abs/math/9804119v2
PDF: arxiv.org/pdf/math/9804119v2

Article by Leigh Marie Braswell and Tanya Khovanova
In collections: Puzzles, Animals, Food, Fibonaccinalia, Fun maths facts
The Cookie Monster Problem supposes that the Cookie Monster wants to empty a set of jars filled with various numbers of cookies. On each of his moves, he may choose any subset of...
URL: arxiv.org/abs/1309.5985v1
PDF: arxiv.org/pdf/1309.5985v1

Best Laid Plans of Lions and Men
Article by Mikkel Abrahamsen and Jacob Holm and Eva Rotenberg and Christian Wulff-Nilsen
In collections: Attention-grabbing titles, Protocols and strategies, Animals, Fun maths facts
We answer the following question dating back to J.E. Littlewood (1885 - 1977): Can two lions catch a man in a bounded...
URL: arxiv.org/abs/1703.03687v1
PDF: arxiv.org/pdf/1703.03687v1

Juggling Probabilities
Article by Warrington, Gregory S.
In collection: Easily explained
URL: jstor.org/pss/30037409

Proposal to Encode the Ganda Currency Mark for Bengali in ISO/IEC 10646
Article by Anshuman Pandey
In collections: Easily explained, Notation and conventions
URL: std.dkuug.dk/JTC1/SC2/wg2/docs

The Laurent phenomenon
Article by Fomin, Sergey and Zelevinsky, Andrei
A composition of birational maps given by Laurent polynomials need not be given by Laurent polynomials; however, sometimes---quite unexpectedly---it does. We suggest a unified treatment of this phenomenon, which covers a large class of applications. In particular, we settle in the affirmative a conjecture of D.Gale...
URL: arxiv.org/abs/math.CO/0104241

Benjamin Peirce and the Howland will
Article by Meier, Paul and Zabell, Sandy
In collection: History
URL: jstor.org/stable/10.2307/22876
PDF: ben-israel.rutgers.edu/711/Mei

Problems to sharpen the young
Article by Hadley, John and Singmaster, David
In collections: Easily explained, Puzzles
An annotated translation of Propositiones ad acuendos juvenes, the oldest mathematical problem collection in Latin, attributed to Alcuin of York.
URL: jstor.org/stable/10.2307/36203

Estimating the Effect of the Red Card in Soccer
Article by Vecer, Jan and Kopriva, Frantisek
In collection: Easily explained
We study the effect of the red card in a soccer game. A red card is given by a referee to signify that a player has been sent off following a serious misconduct. The player who has been sent off must leave the game immediately and cannot be replaced...
URL: stat.columbia.edu/~vecer/redca

Light reflecting off Christmas-tree balls
Web page by Joseph O'Rourke
In collection: Easily explained
'Twas the night before Christmas and under the tree Was a heap of new balls, stacked tight as can be. The balls so gleaming, they reflect all light rays, Which bounce in the stack every which way. When, what to my wondering mind does occur: A...
URL: mathoverflow.net/questions/501

Spontaneous knotting of an agitated string.
Article by Raymer, Dorian M and Smith, Douglas E
In collection: Easily explained
It is well known that a jostled string tends to become knotted; yet the factors governing the "spontaneous" formation of various knots are unclear. We performed experiments in which a string was...
URL: pubmedcentral.nih.gov/articler

Division by three
Article by Doyle, Peter G. and Conway, John Horton
In collection: Fun maths facts
We prove without appeal to the Axiom of Choice that for any sets A and B, if there is a one-to-one correspondence between 3 cross A and 3 cross B then there is a one-to-one correspondence between A and B. The first such proof, due to...
URL: arxiv.org/abs/math/0605779v1
PDF: arxiv.org/pdf/math/0605779v1.p

Notes on the Fourth Dimension
Article by Jon Crabb
In collections: Art, Geometry
Hyperspace, ghosts, and colourful cubes — Jon Crabb on the work of Charles Howard Hinton and the cultural history of higher dimensions.
URL: publicdomainreview.org/2015/10

Theoretical Computer Science Cheat Sheet
Article by Steve Seiden
In collections: Basically computer science, Lists and catalogues
URL: tug.org/texshowcase/cheat.pdf

The 1-Hyperbolic Projection for User Interfaces
Article by Kolliopoulos, Alexander
In collection: Basically computer science
The problem of dealing with representations of information that does not fit conveniently within allotted screen space is pervasive in graphical interfaces. While there are techniques for dealing with this problem in various ways, some properties of...
URL: dgp.toronto.edu/~alexk/hyperpr
The ménage problem asks for the number of ways of seating $n$ couples at a circular table, with men and women alternating, so that no one sits next to his or her partner. We present a straight-forward solution to this problem. What...
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