Andrew Ogg

Andrew Pollard Ogg (born April 9, 1934, Bowling Green, Ohio) is an American mathematician and professor emeritus of mathematics at the University of California, Berkeley. He is known for his contributions to number theory and algebraic geometry, including several foundational results on elliptic curves and modular curves. His 1975 observation connecting supersingular primes to the monster group is widely regarded as the earliest hint of monstrous moonshine.