Nikolay Nikolaevich Bogolyubov (another spelling Bogoliubov, Russian: Николай Николаевич Боголюбов, Ukrainian: Микола Миколайович Боголюбов; 21 August 1909, Nizhny Novgorod — 13 February 1992, Moscow) was a Russian and Ukrainian Soviet mathematician and theoretical physicist known for a significant contribution to quantum field theory, classical and quantum statistical mechanics, and to the theory of dynamical systems; a recipient of the Dirac Prize (1992). Image:Cscr-featured.png