Ivan Petrovsky
Ivan Petrovsky was born on January 18, 1901. See ranking, bio blurb, and everyone else born that day.
About Ivan Petrovsky
Ivan Georgiyevich Petrovsky (Russian: Иван Георгиевич Петровский; 18 January 1901 – 15 January 1973) was a Soviet mathematician working mainly in the field of partial differential equations. He greatly contributed to the solution of Hilbert's 19th and 16th problems, and discovered what are now called Petrovsky lacunas. He also worked on the theories of boundary value problems, probability, and on the topology of algebraic curves and surfaces.