Were Pavel Urysohn and Leonid Levin known for the same type of work?
Leonid Levin Leonid Anatolievich Levin ( ; Russian: Леони́д Анато́льевич Ле́вин ; Ukrainian: Леоні́д Анато́лійович Ле́він ; born November 2, 1948) is a Soviet-American computer scientist.
Apollon Mokritsky Apollon Nikolayevich Mokritsky (Ukrainian: Аполлон Миколайович Мокрицький , "Apollon Mokrytskyi"; Russian: Аполлон Николаевич Мокрицкий , "Apollon Mokritsky", August 1810 – 1870) was a Russian-Ukrainian painter of the Biedermeier period of Realist art. From 1849, he was a full member of the Saint Petersburg Academy of Arts.