Leo Zippin

[1] He is best known for solving Hilbert's Fifth Problem with Deane Montgomery and Andrew M. Gleason in 1952.

He did his undergraduate and graduate work at the University of Pennsylvania in 1929.

Leo Zippin is the author of The Uses Of Infinity, and together with Deane Montgomery, the monograph Topological Transformation Groups.

In 1952, he, along with Andrew M. Gleason and Deane Montgomery solved Hilbert's fifth problem.

[4] He taught at Queens College in Flushing, NY.