TY - JOUR AU - N. A. Ilyasov TI - Order equalities in the spaces $L_p(\mathbb T), 1$ < $p$ < $\infty$, for best approximations and moduli of smoothness of derivatives of periodic functions with monotone Fourier coefficients JO - Trudy Instituta matematiki i mehaniki PY - 2022 SP - 103 EP - 120 VL - 28 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2022_28_4_a9/ LA - ru ID - TIMM_2022_28_4_a9 ER -