[1] He was awarded his doctorate on algebraic curve equivalence concepts in 1950.

He was also a visiting professor in Mexico City, IHÉS, Rome, Leiden, and at Harvard University.

In 1960, he shared the Cole Prize in algebra with Serge Lang for his work on generalized Jacobian varieties.

[2][3] He also studied the algorithmic algebraic theory of integration.

He died of neurological disease on a trip to Hawaii.