GEORGE DAVID BIRKHOFF was born at Overisel, Michigan, on the twenty-first of March, 1884. His ancestry was Dutch on both sides. His father, David Birkhoff, came from
Holland in 1870, and during George David’s growing years was a physician in Chicago. Birkhoff studied at the Lewis Institute, Chicago, from 1896 to 1902, and at the University
of Chicago for a year. After this he went to Harvard, where he received the Bachelor’s degree in 1905.

George David Birkhoff (March 21, 1884 – November 12, 1944) was an American mathematician, best known for what is now called the ergodic theorem. Birkhoff was one of the most important leaders in American mathematics in his generation, and during his prime he was considered by many to be the preeminent American mathematician.[1] His parents were David Birkhoff and Jane Gertrude Droppers.[2] The mathematician Garrett Birkhoff (1911–1996) was his son.

Profesor de matemáticas en la Real Universidad de México, doctor en medicina, promotor de unas pastillas férricas de su fabricación mediante sendos opúsculos en español y náhuatl, oficial en la contaduría de la Casa de Moneda de la Nueva España, ensayador del Virrey, Apartador general del oro y plata del Reino, y crítico ilustrado del entonces emergente culto a la Virgen de Guadalupe, lo que le atrajo no pocos recelos y sinsabores (falleció antes de ver publicado su Manifiesto satisfactorio anunciado en la Gazeta de México (tomo I, núm. 53): Opúsculo Guadalupano, México 1790, 123 págs., de cuya edición hubo de encargarse su viuda).

Alberto Verjovsky es un matemático mexicano, reconocido por sus contribuciones a geometría, topología y dinámica. Fue alumno de Solomon Lefschetz en la Universidad de Brown, donde obtuvo su