Image of Heinz Hopf

Heinz Hopf

was born 128 years ago

19 November 1894

Hopf's work was in algebraic topology. He studied vector fields and extended Lefschetz's fixed point formula. He also studied homotopy classes and defined what is now known as the 'Hopf invariant'.

Find out more at: https://mathshistory.st-andrews.ac.uk/Biographies/Hopf/