TY - JOUR AU - M. K. Potapov AU - B. V. Simonov TI - Improvement of the Ul'yanov inequality for mixed moduli of smoothness for functions with lacunary Fourier coefficients JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2012 SP - 18 EP - 24 IS - 1 UR - http://geodesic.mathdoc.fr/item/VMUMM_2012_1_a2/ LA - ru ID - VMUMM_2012_1_a2 ER -