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Theory of approximation. Translated from the Russian 1947 edition by Charles J. Hyman. (English) Zbl 0072.28403
New York: Frederick Ungar Publishing Co. (1956).

MSC:
41-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to approximations and expansions
42-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to harmonic analysis on Euclidean spaces