Leopold Kronecker, Polish-German mathematician and academic (born 1823)

Leopold Kronecker was a German mathematician who worked on number theory, abstract algebra and logic, and criticized Georg Cantor's work on set theory. Heinrich Weber quoted Kronecker as having said, "Die ganzen Zahlen hat der liebe Gott gemacht, alles andere ist Menschenwerk" . Kronecker was a student and life-long friend of Ernst Kummer.

December 29 is the 363rd day of the year in the Gregorian calendar; two days remain until the end of the year.