This article is cited in 1 paper

The best approximation to the operator of the second mixed derivative

O. A. Timoshin


Abstract: Accurate estimates are derived for the best approximation to the operator of the second mixed derivative on some classes of functions of two variables. These classes are defined by partial derivatives of the second and third orders.

MSC: 41A50, 41A65, 41A17, 26D10

Received: 13.05.1996

DOI: 10.4213/im184

 English version: Izvestiya: Mathematics, 1998, 62:1, 191–200

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