Nikolay Gur'yevich Chetaev (23 November 1902 – 17 October 1959) was a Russian Soviet mechanician and mathematician.
At the suggestion of D. N. Seiliger in 1929 he came to Germany to do his postdoctoral research at Goettingen University and to study the scientific achievements of School of Aerodynamics of Professor Ludwig Prandtl.
From 1930 to 1940 N. G. Chetaev was a professor of Kazan University where he created a scientific school of the mathematical theory of stability of motion.
The school consisted of thirty one of his doctoral students, direct followers and collaborators, among whom there are such prominent mathematicians as Nikolay Krasovsky and Valentin Rumyantsev.
In 1940 N. G. Chetaev organized and became a head of Department of General Mechanics at Institute of Mechanics of Academy of Sciences of USSR (on 21 November 1991 renamed into Russian Academy of Sciences) that was opened in the same year.
(Valentin Rumyantsev) Беззаветное служение науке и образованию.