Were Maxim Kontsevich and Aleksandr Lyapunov both mathematicians?
Aleksandr Lyapunov Aleksandr Mikhailovich Lyapunov (Russian: Алекса́ндр Миха́йлович Ляпуно́в , ] ; June 6 [O.S. May 25] 1857 – November 3, 1918) was a Russian mathematician, mechanician and physicist. His surname is sometimes romanized as Ljapunov, Liapunov, Liapounoff or Ljapunow. He was the son of astronomer Mikhail Lyapunov and the brother of pianist and composer Sergei Lyapunov.
Alexander Kotov Alexander Alexandrovich Kotov (Алекса́ндр Алекса́ндрович Ко́тов; 12 August [O.S. 30 July] 1913 – 8 January 1981) was a Soviet chess grandmaster and author. He was a Soviet champion, a two-time world title Candidate, and a prolific chess author. Kotov served in high posts in the Soviet Chess Federation and most of his books were written during the period of Cold War between the US and the USSR.