Guy Hirsch (20 September 1915 â 4 August 1993) was a Belgian mathematician and philosopher of mathematics, who worked on algebraic topology and epistemology of mathematics.
He became a member of the Royal Flemish Academy of Belgium for Science and the Arts in 1973.
He is known for the LerayâÂÂHirsch theorem, a basic result on the algebraic topology of fiber bundles that he proved independently of Jean Leray in the late 1940s.