17 posts tagged with Mathematics by Wolfdog.
Displaying 1 through 17 of 17.

156829? Mass-market. Tacky.

Artisanal Integers - Summer of 2012. Suddenly several “integer-as-a-service-providers” spring from nowhere. They deliver “artisanal integers”. Integers which (they claim) are “hand-crafted and guaranteed to be unique and hella-beautiful”.
posted by Wolfdog on Feb 4, 2016 - 78 comments

0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, ...

Fair sharing, the Thue-Morse sequence, infinitely long chess games, and related ideas. [A light, 10 minute video]
posted by Wolfdog on Jan 28, 2016 - 17 comments

I'm a graph just like you

[In late 2015], László Babai, of the University of Chicago, announced that he had come up with a new algorithm for the “graph isomorphism” problem, one of the most tantalizing mysteries in computer science.
posted by Wolfdog on Jan 24, 2016 - 22 comments

I feel like I’ve finally gotten to know Ada Lovelace

Untangling the Tale of Ada Lovelace - by Stephen Wolfram; a good read, even if you're generally familiar with the story of Lovelace, Babbage, and the Difference Engine.
posted by Wolfdog on Jan 19, 2016 - 13 comments

Let me tell you about the equilibrium of bodies...

Published in 1913, a best-seller in the 1930s and long out of print, Physics for Entertainment was translated from Russian into many languages and influenced science students around the world ... In the foreword, the book’s author describes the contents as “conundrums, brain-teasers, entertaining anecdotes, and unexpected comparisons,” adding, “I have quoted extensively from Jules Verne, H. G. Wells, Mark Twain and other writers, because, besides providing entertainment, the fantastic experiments these writers describe may well serve as instructive illustrations at physics classes.”
posted by Wolfdog on Jan 13, 2016 - 6 comments

It's true because pictures

(1 + 2 + … + n)2 = (13 + 23 + … + n3) [animated GIF]
(unanimated version)
posted by Wolfdog on May 26, 2015 - 48 comments

No Pentagons

Imperfect Congruence - It is a curious fact that no edge-to-edge regular polygon tiling of the plane can include a pentagon ... This website explains the basic mathematics of a particular class of tilings of the plane, those involving regular polygons such as triangles or hexagons. As will be shown, certain combinations of regular polygons cannot be extended to a full tiling of the plane without involving additional shapes, such as rhombs. The site contains some commentary on Renaissance research on this subject carried out by two renowned figures, the mathematician-astronomer Johannes Kepler and the artist Albrecht Dürer. [more inside]
posted by Wolfdog on Jan 14, 2015 - 16 comments

"Science is when you think a lot."

Two enjoyable chapters [PDF, 33 pages] from the book Math from Three to Seven: The Story of a Mathematical Circle for Preschoolers. "This book does not purport to show you how to create precocious high achievers. It is just one person's story about things he tried with a half-dozen young children."
posted by Wolfdog on Dec 29, 2014 - 11 comments

Of course, everyone knows about levers...

Elementary Mechanics from a Mathematician's Viewpoint [direct link to large PDF] by Michael Spivak - notes from his eight 2004 lectures (which eventually became a book). See the quote inside to get the flavor of it. [more inside]
posted by Wolfdog on Oct 4, 2014 - 24 comments

It's just a jump to the ... well, in any legal direction really

The Peg Solitaire Army is a problem spun off from a classic recreation, and yet another example of the golden ratio turning up where you least expect it. If you want to look at the game more deeply, George Bell's solitaire pages are the ne plus ultra: There's more about the solitaire army (and variants), ... [more inside]
posted by Wolfdog on Aug 15, 2014 - 6 comments

do while !glory

Welcome to Al Zimmermann's Programming Contests. You've entered an arena where demented computer programmers compete for glory and for some cool prizes. The current challenge is just about to come to an end, but you can peruse the previous contests and prepare for the new one starting next month.
posted by Wolfdog on Aug 14, 2014 - 11 comments

Orchestrate Illusions (Superpermuter)

The Minimal Superpermutation Problem - Imagine that there is a TV series that you want to watch. The series consists of n episodes, with each episode on a single DVD. Unfortunately, however, the DVDs have become mixed up and the order of the episodes is in no way marked (and furthermore, the episodes of the TV show are not connected by any continuous storyline – there is no way to determine the order of the episodes just from watching them). Suppose that you want to watch the episodes of the TV series, consecutively, in the correct order. The question is: how many episodes must you watch in order to do this? [more inside]
posted by Wolfdog on Aug 10, 2014 - 34 comments

Beaded Beads

Beaded PolyhedraMore beadwork (mathematical and otherwise) by Gwen Fisher ❂ Still more beadwork galleries at beAdinfinitumThree-dimensional finite point groups and the symmetry of beaded beads [pdf - some algebra, but lots of illustrations]
posted by Wolfdog on Jul 19, 2011 - 6 comments

Then you wouldn't have to say "QED", 'cause I'd already know

A thread full of proofs without words at MathOverflow and quite a lot more of them courtesy of Google Books.
posted by Wolfdog on Jul 18, 2011 - 22 comments

I don't know much about math, but I know what I like.

Plus magazine has compiled all their articles on mathematics and the arts into one handy-dandy page full of highly enjoyable articles ranging from limericks and screeching violins to the restoration of frescoes.
posted by Wolfdog on May 16, 2010 - 3 comments

Mathematics Illuminated

Mathematics Illuminated is a set of thirteen surveys in varied topics in mathematics, nicely produced with video, text, and interactive Flash gadgets for each of the topics.
posted by Wolfdog on Apr 14, 2010 - 8 comments

Who is Alexander Grothendieck?

Who is Alexander Grothendieck? [PDF] This lecture is concerned not with Grothendieck's mathematics but with his very unusual life on the fringes of human society. In particular, there is, on the one hand, the question of why at the age of forty-two Grothendieck first of all resigned his professorship at the Institut des Hautes Etudes Scientifiques (IHES); then withdrew from mathematics completely; and finally broke off all connections to his colleagues, students, acquaintances, friends, as well as his own family, to live as a hermit in an unknown place. On the other hand, one would like to know what has occupied this restless and creative spirit since his withdrawal from mathematics.
posted by Wolfdog on Aug 17, 2008 - 31 comments

Page: 1