By 1931 when he was appointed to the chair at Bologna he already had 40 publications in algebraic geometry, differential geometry, topology and differential equations . However he was of Jewish background and the Fascist Italian Government forced him out and he went to England.
Sa pamamagitan ng 1,931 kapag siya ay hihirangin upang angkinin ang upuan sa Bologna siya na may 40 mga pahayagan sa algebraic geometry, kaugalian geometry, topology at kaugalian equation. Gayunman siya ay Hudyo ng background at ang Pananalanta ng pasistang Italian Government sapilitang sa kanya at siya napunta sa England.