Theorem of the Day has a 'new acquisition': the Wedderburn-Artin Theorem

Theorem of the Day has a 'new acquisition': the Lagrange Interpolation Formula

Theorem of the Day has a 'new acquisition': the Skolem-Noether Theorem

Theorem of the Day has a 'new acquisition': the Asymptotic (Half) Liar Formula

Theorem of the Day has a 'new acquisition': the Lucas-Lehmer Test

Theorem of the Day has a 'new acquisition': the Euclid-Euler Theorem

Theorem of the Day has a 'new acquisition': The Ollerenshaw-Brée Formula

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.