V. P. Il'in, “Approximation of functions in the spaces $\widetilde{W}_p^{(l)}(D)$ and $W_p^{(l)}(D)$ by continuously differentiable functions”, Dokl. Akad. Nauk SSSR, 1961, Volume 137, Number 6,Pages 1283

MATHEMATICS

Approximation of functions in the spaces $\widetilde{W}_p^{(l)}(D)$ and $W_p^{(l)}(D)$ by continuously differentiable functions

V. P. Il'in

Leningrad Department of V. A. Steklov Institute of Mathematics, USSR Academy of Sciences

Presented: V. I. Smirnov
Received: 17.12.1960