 solomon lefschetz (; 3 september 1884 â 5 october 1972) was an american mathematician who did fundamental work on algebraic topology, its applications to algebraic geometry, and the theory of non-linear ordinary differential equations. ==life== he was born in moscow into a mizrahi jewish family (his parents were ottoman citizens) who moved shortly after that to paris. he was educated there in engineering at the Ãcole centrale paris, but emigrated to the usa in 1905. he was badly injured in an industrial accident in 1907, losing both hands. he moved towards mathematics, receiving a ph.d. in algebraic geometry from clark university in worcester, massachusetts in 1911. he then took positions in university of nebraska and university of kansas, moving to princeton university in 1924, where he was soon given a permanent position. he remained there until 1953. in the application of topology to algebraic geometry, he followed the work of [[charles Ãmi
1884_births 1972_deaths 20th-century_American_mathematicians Clark_University_alumni Foreign_Members_of_the_Royal_Society Jewish_American_scientists National_Medal_of_Science_laureates Presidents_of_the_American_Mathematical_Society Princeton_University_faculty Russian_Jews Topologists University_of_Kansas_faculty Acole_Centrale_Paris_alumni