23rd March

On this day in 1881, J J Sylvester wrote to Arthur Cayley to announce,
I believe that I have proved Gordan's Theorem, and can assign a superior limit to the number of fundamental invariants.
His proof was founded on the prospect that a certain sequence increased without bound. By October he knew that it did not.

On this day in 2015 Google released an Emmy Noether doodle.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1955.