Chaplygin, Sergey (1869-1942)

Chaplygin was a Russian physicist and mathematician. His early work was in hydromechanics, but he may be best known for the partial differential equation, Chaplygin's equation, that is used in the study of transonic flow.

Stamps

Stamp	Description
	Russia, 30k, 1944 Scott: 945 A497
	Russia, 1r, 1944 Scott: 946 A497