sentences:  Birkhoff was influential in advancing the field of mathematics, solving Henri Poincaré's "last geometric theorem", and developing what is now called the "ergodic theorem", a thesis important in statistical physics and the study of dynamical systems.Virtually every honor available to mathematicians was bestowed on him during his lifetime, and there is a prize named in his honor.Birkhoff lived in this house for eight years, from 1920 to 1928.