I. Yu. Kharrik, “Approximation by functions of special type to functions vanishing, together with their gradient, on the boundary of a region”, Mat. Sb. (N.S.), 1959, Volume 47(89), Number 2,Pages <nobr>177

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Mat. Sb. (N.S.), 1959 Volume 47(89), Number 2, Pages 177–208 (Mi sm4867)

Approximation by functions of special type to functions vanishing, together with their gradient, on the boundary of a region

I. Yu. Kharrik

Received: 20.06.1957

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