Sergei Lyapunov

Sergei Mikhailovich Lyapunov (or Liapunov; Russian: Серге́й Миха́йлович Ляпуно́в, Russian pronunciation: [sʲɪrˈɡʲej mʲɪˈxajləvʲɪtɕ lʲɪpʊˈnof]; 30 November [O.S. 18 November] 1859 – 8 November 1924) was a Russian composer, pianist and conductor.