Sergey Chaplygin, Russian physicist, mathematician, and engineer (born 1869)

Sergey Chaplygin

Russian-Soviet engineer, mathematician and physicist

Sergey Alexeyevich Chaplygin was a Russian and Soviet physicist, mathematician, and mechanical engineer. He is known for mathematical formulas such as Chaplygin's equation and for a hypothetical substance in cosmology called Chaplygin gas, named after him.