Theorem of the Day

 

 

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    2009 Calendar "12 Theorems by Women Mathematicians"
   

Change history and individual file downloads

I will try to keep the complete download of the 2009 calendar as up to date as I can. If you have already downloaded the calendar you may want to replace individual files which have been corrected or improved. This is the place to do it. If you have bought a printed copy of the calendar then you can at least keep informed of errors (if you have access to a colour printer you may even want to print out a new version of a particular month's theorem to stick over the incorrect one).

I am very grateful to everyone who has taken the trouble to point out errors to me.

Version v1. 13 November 2101 GMT: initial upload.

Version v2. 27 November 1426 GMT: one of the permutations in the illustration for October's theorem (an Erdős-Ko-Rado Theorem for Intersecting Permutations) was incorrectly typed, so that 3 and 4 were both mapped to 3. Corrected file (click to view the pdf file in a new window and save a copy if required).

Version v3. 13 December 1815 GMT: corrected the spelling of Benoit Larose in October's theorem (an Erdős-Ko-Rado Theorem for Intersecting Permutations) (thanks to Claudia Malvenuto for spotting it, and apologies to Prof. Larose). Corrected file (click to view the pdf file in a new window and save a copy if required). Replaced January's theorem (A Theorem on Apollonian Circle Packings) with a new version with much improved images of the packings (thanks to Emil Vaughan of Queen Mary University of London for these). Corrected file (click to view the pdf file in a new window and save a copy if required).

 


Theorem of the Day is maintained by Robin Whitty. Comments or suggestions are welcomed by me.

All text and images and associated .pdf files © Robin Whitty, 2005–2009, except where otherwise acknowledged.