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A note on the strong de la Vallé Poussin approximation. (English) Zbl 0857.42018

The author extends his own result on strong approximation [Acta Sci. Math. 32, 41-50 (1971; Zbl 0214.08102)] to very strong approximation.

MSC:

42C15 General harmonic expansions, frames
41A30 Approximation by other special function classes

Citations:

Zbl 0214.08102