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.

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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.