Improvement of the Ul'yanov inequality for mixed moduli of smoothness for functions with lacunary Fourier coefficients / M. K. Potapov, B.  Simonov. // Vestnik Moskovskogo Universiteta. Seriya 1. Matematika. Mekhanika. 2012. № 1. P. 18-24 [Moscow Univ. Mech. Bulletin. Vol. 72, N 2, 2017. P. 0].

Key words: mixed module of smoothness, lacunary Fourier coefficients, Ul'yanov's inequality.

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№ 1/2012