dana blogs math: The Talk That Wasn’t

(Originally posted 26 September.) Today I had the real privilege of hearing Manuel Blum’s talk at the Heidelberg Laureate Forum. It was about… “Wait a minute!” I hear you saying. “Manuel Blum didn’t give a talk at the forum!”...

Math, chess, and cheating

Last week I rather unexpectedly was waylaid by a math problem, which I spent 5 days working on to the exclusion of everything else — eating, sleeping, studying chess,… A college friend of mine sent me the following question, which he discovered 25 years...