Soviet mathematician N.I. Akhiezer (1901-80) was noted for his works in approximation theory and the theory of differential and integral operators. He is also the author of classic books on analysis and the history of mathematics. He studied at the Kiev Institute of Public Education (now known as Taras Shevchenko National University of Kyiv). In 1928, he defended his PhD thesis "Aerodynamical Investigations" under the supervision of Dimity Grave. From 1928-33 he worked at the Kiev University and at the Kiev Aviation Institute.