Pyotr Novikov and Sofia Kovalevskaya had what career in common?
Pyotr Novikov: Pyotr Sergeyevich Novikov (Russian: Пётр Серге́евич Но́виков ; 15 August 1901, Moscow, Russian Empire – 9 January 1975, Moscow, Soviet Union) was a Soviet mathematician. Sofia Kovalevskaya:  She was the first major Russian female mathematician and a pioneer for women in mathematics around the world.
mathematician