Were Pavel Urysohn and Leonid Levin known for the same type of work?
Pavel Urysohn Pavel Samuilovich Urysohn (Па́вел Самуи́лович Урысо́н ) (February 3, 1898 – August 17, 1924) was a Soviet mathematician of Jewish origin who is best known for his contributions in dimension theory, and for developing Urysohn's Metrization Theorem and Urysohn's Lemma, both of which are fundamental results in topology. His name is also commemorated in the terms Urysohn universal space, Fréchet–Urysohn space, Menger–Urysohn dimension and Urysohn integral equation. He and Pavel Alexandrov formulated the modern definition of compactness in 1923.
Georgy Arbatov Georgy Arkadyevich Arbatov (Russian: Гео́ргий Арка́дьевич Арба́тов , 19 May 1923, Kherson – 1 October 2010, Moscow) was a Soviet and Russian political scientist who served as an adviser to five General Secretaries of the Communist Party of the Soviet Union and was best known in the West during the Cold War era as a representative for the policies of the Soviet Union in the United States, where his fluent English helped make him a frequent guest on American television. He was the founding Director and later Emeritus Director of the Institute of USA and Canada of the Russian Academy of Sciences (ISKRAN), the Soviet and Russian think tank for the study of USA and Canada.