Theorem of the Day has a 'new acquisition': A Theorem on Apollonian Circle Packings

Theorem of the Day has two 'new acquisitions': The Existence Theorem for Orthogonal Diagonal Latin Squares and Theaetetus' Theorem on the Platonic Solids

The 2009 Theorem of the Day calendar "12 Theorems by Women Mathematicians" is now available for free download and will be available to buy in printed format soon.

Theorem of the Day has a 'new acquisition': The Total Probability Theorem

The 2009 calendar "12 Theorems by Women Mathematicians" is now available for purchase at the Gallery Shop

theoremoftheday.org now offers a link which automatically loads today's theorem on to your screen (thanks to Erik Koelink at Radboud Universiteit for this idea!)

Theorem of the Day has a 'new acquisition': The Change of Variables Theorem

Theorem of the Day has a 'new acquisition': Praeger's Theorem on Bounded Movement, marking the occasion of Cheryl Praeger's 60th birthday conference in Perth this coming week

The 2009 calendar "12 Theorems by Women Mathematicians" is now reduced in price to £10 + postage and packing. I will be selling them at that price tomorrow at the Open University Winter Combinatorics Meeting, Milton-Keynes

Theorem of the Day has a 'new acquisition': Theorems of Euler and Rényi on 'e'

A corrected version of Theorem no. 29, Gauss's Law of Quadratic Reciprocity, has been posted. In stating the Law its dependence on the second variable q was ommitted (thanks to John Drost for pointing this out to me).

Theorem of the Day has a 'new acquisition': Wallis's Theorem

Theorem of the Day now has an FAQ page.

Theorem of the Day has a 'new acquisition': Vaughan Pratt's Theorem

Theorem of the Day has a 'new acquisition': Strassen's Matrix Theorem

Theorem of the Day has a 'new acquisition': a Theorem on Rectangular Tensegrities

Theorem of the Day has an embryonic international listing of public events on mathematics to which everyone is welcome to submit items

Theorem of the Day has a 'new acquisition': the Piff-Welsh Theorem

Theorem of the Day has two 'new acquisitions': Sylvester's Law of Inertia and The Robinson-Schensted-Knuth Correspondence

Theorem of the Day has a 'new acquisition': Lieb's Square Ice Theorem