Question: Anatoly Maltsev and Valentin Turchin were both from Russia, which of the two is known for his work as a mathematician?
Sentence (from "Andrei Tverdokhlebov"): Andrei Nikolayevich Tverdokhlebov (Russian: Андре́й Никола́евич Твердохле́бов , 30 September 1940, Moscow – 3 December 2011, Pennsylvania, United States) was a Soviet physicist, dissident and human rights activist.
Relevant evidence: No