Dr. Emil L. Post
Emil L. Post was a City College alumnus and then returned after
completing his Ph.D. from Columbia University to become faculty in
1936. His research contributed to various fields of mathematics
including polyadic groups, recursively enumerable sets, degrees of
unsolvability, and combinatorics. He is best known for his work in
computability theory and mathematical models that are similar to
the Turing machine model.
He graduated from City College (1917) with a B.S. in mathematics
and received his Ph.D. from Columbia University (1920).