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.
Ivan Ivanovich Zhegalkin Ivan Ivanovich Zhegalkin (Russian Ива́н Ива́нович Жега́лкин; alternative romanizations: Žegalkin, Gégalkine) (August 3, 1869, Mtsensk – March 28, 1947, Moscow) was a Russian mathematician. He is best known for his formulation of Boolean algebra as the theory of the ring of integers mod 2, via what are now called Zhegalkin polynomials.