Which mathematician joined Yale in 1991, Grigory Margulis or Boris Galerkin?
Grigory Margulis Gregori Aleksandrovich Margulis (Russian: Григо́рий Алекса́ндрович Маргу́лис , first name often given as Gregory, Grigori or Grigory; born February 24, 1946) is a Russian-American mathematician known for his work on lattices in Lie groups, and the introduction of methods from ergodic theory into diophantine approximation. He was awarded a Fields Medal in 1978 and a Wolf Prize in Mathematics in 2005, becoming the seventh mathematician to receive both prizes. In 1991, he joined the faculty of Yale University, where he is currently the Erastus L. De Forest Professor of Mathematics.
Boris Grakov Boris Nikolaevich Grakov (Russian: Борис Николаевич Граков ) (December 13 [O.S. December 1] 1899 in Onega — September 14, 1970 in Moscow) was a Soviet Russian archaeologist, who specialized in Scythian and Sarmatian archeology, classical philology and ancient epigraphy.