9th May

On this day in 1831, during a dinner to celebrate his acquittal on a charge of attempting to overthrow the government, Évariste Galois raised his glass and with an open dagger in his hand appeared to make threats against the French king, Louis-Phillipe. The next day Galois was arrested and held in Sainte-Pélagie prison.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1953.