Nikolaĭ Pavlovich Korneĭchuk

• Exact constants in approximation theory
• Extremal properties of polynomials and splines
• Ėkstremalʹnye svoĭstva polinomov i splaĭnov
• Approksimat͡s︡ii͡a︡ s ogranichenii͡a︡mi
• Ėkstremalʹnye zadachi teorii priblizhenii͡a︡
• Splaĭny v teorii priblizhenii͡a︡
• Tochnye konstanty v teorii priblizhenii͡a︡