Birkhoff was one of the very
best mathematicians on this
side of the
Atlantic. He published and lectured in many fields but his
greatest
contributions were probably in research into dynamical systems.

**Born: March 21,1884**

**in Overisel, Michigan**

**Died: November 12, 1944**

**in Cambridge, MA**

Unlike many of his
contemporaries in math and science, Birkhoff did not travel to Europe
until 1926, or 13 years after he had achieved renown with his proof of
Poincaré's last geometric theorem.