Alfred Kempe

was born 169 years ago

6th July 1849

**Alfred Kempe** published a false "proof" of the four colour theorem in 1879 which stood until Heawood showed the mistake 11 years later. The 'proof' is however still the basis for the computer aided proof discovered 100 years later.

*Find out more at*:

http://www-history.mcs.st-andrews.ac.uk/Biographies/Kempe.html