deaths
February 13, 1992
Nikolay Bogolyubov, Ukrainian-Russian mathematician and physicist (born 1909)
Nikolay Bogolyubov
Nikolay Nikolayevich Bogolyubov was a Soviet, Ukrainian and Russian mathematician and theoretical physicist known for a significant contribution to quantum field theory, classical and quantum statistical mechanics, and the theory of dynamical systems; he was the recipient of the 1992 Dirac Medal for his works and studies.