"[1] Ernst Snapper, born to a Jewish family in the Netherlands, received in 1936 the equivalent of a master's degree from the University of Amsterdam.
[1] An early sequence of papers extended the Steinitz field theory to completely primary rings using ideas from the work of Krull.
During his visits at Princeton and Harvard, Snapper studied algebraic geometry and the homological and sheaf-theoretic methods of Serre and Grothendieck.
Later he applied those methods in several important papers on the polynomial properties of the Euler characteristic associated with divisor classes of an irreducible normal projective variety.
In the area of combinatorial mathematics, Snapper extended de Bruijn’s theory of the cycle index of a finite group to that of an arbitrary permutation representation.