3 posts tagged with Mathematics by DU.

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Happy half-τ day! What's a half-τ? You know it as π, but π is wrong. (via)

posted by DU on Mar 14, 2011 - 100 comments

posted by DU on Mar 14, 2011 - 100 comments

The Cornell Historical Math Monographs archive has a great many famous papers, including works by De Morgan, Hamilton, Descartes (warning: French) and of course Lewis Carroll. [more inside]

posted by DU on Jun 15, 2009 - 7 comments

posted by DU on Jun 15, 2009 - 7 comments

What if Euclid had been Japanese? There are traditionally stated and proved theorems *about* origami. And MetaFilter has previously explored modular origami (as well as the boring old artistic kind), which has a geometric foundation. However, origami itself is a powerful mathematical framework that allows one to, for instance, solve the famously insoluable problem of trisecting an angle. More generally: Traditional geometry solves quadratic equations, origami solves cubic ones. (Many more mathematical items about and using origami can be found in the excellent mathematics teachers' book: Project Origami: Activities for Exploring Mathematics, most of which are unfortunately not findable online).

posted by DU on Feb 13, 2007 - 9 comments

posted by DU on Feb 13, 2007 - 9 comments

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