On the best approximation of functions of $n$ variables

• Дата: 1999
• Автори: Korneichuk, N. P., Корнійчук, М. П.
• Формат: Стаття
• Мова: Українська; Англійська
• Опубліковано: Institute of Mathematics, NAS of Ukraine 1999
• Онлайн доступ: https://umj.imath.kiev.ua/index.php/umj/article/view/4734
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

We propose a new approach to the solution of the problem of the best approximation, by a certain subspace for functions ofn variables determined by restrictions imposed on the modulus of, continuity of certain partial derivatives. This approach is based on the duality theorem and on the representati...