Geodesic
Improvement of the Ul'yanov inequality for mixed moduli of smoothness for functions with lacunary Fourier coefficients
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2012), pp. 18-24 
M. K. Potapov; B. V. Simonov. Improvement of the Ul'yanov inequality for mixed moduli of smoothness for functions with lacunary Fourier coefficients. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2012), pp. 18-24. http://geodesic.mathdoc.fr/item/VMUMM_2012_1_a2/
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     title = {Improvement of the {Ul'yanov} inequality for mixed moduli of smoothness for functions with lacunary {Fourier} coefficients},
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Voir la notice de l'article provenant de la source Math-Net.Ru

An inequality for the mixed moduli of smoothness for functions with lacunary Fourier coefficients improving the known Ul'yanov's inequality for moduli of smoothness is obtained in the paper.

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