b. 1966
Joel David Hamkins is an American mathematician and philosopher of mathematics, best known for his work in mathematical logic, set theory, and the philosophy of set theory. He is a leading proponent of the set-theoretic multiverse view, which holds that there is no single privileged universe of sets but rather a plurality of legitimate set-theoretic universes.
Developed the set-theoretic multiverse philosophy
Contributed foundational work on infinitary computability and infinite-time Turing machines
Proved significant results on forcing, large cardinals, and modal logic of forcing
Authored 'Lectures on the Philosophy of Mathematics' (MIT Press, 2021)
Holds the Sir Peter Strawson Fellowship in Philosophy at University College, Oxford