Which Russian mathmatician contributed to number theory, Grigori Perelman or Ivan Fesenko?
Grigori Perelman Grigori Yakovlevich Perelman (Russian: Григо́рий Я́ковлевич Перельма́н ; ] ; born 13 June 1966) is a Russian mathematician. He made a contribution to Riemannian geometry and geometric topology.
Gustav Shpet Gustav Gustavovich Shpet (Russian: Густа́в Густа́вович Шпет ) (April 7 [O.S. March 26] 1879 , Kyiv, Ukraine – November 16, 1937, Tomsk, Russia) was a Ukrainian and Russian philosopher, psychologist, art theoretician, and interpreter (he knew 17 languages). He was a follower of Edmund Husserl's phenomenology and introduced Husserlian phenomenology to Russia, modifying the phenomenology which he found in Husserl.