Nikolai Pavlovich Korneichuk passed away on July 22, 2003. He was recognized worldwide as a leading expert on exact solutions of extremal problems in Approximation Theory as well as a founder of a powerful research school. N.P. Korneichuk was born on January 22, 1920 in the village of Bobrik, in Gomel region of Belarus. His parents were peasants. In 1938, N.P. Korneichuk completed studies in th...