TY - JOUR AU - G. G. Magaril-Il'yaev TI - Trigonometric widths of Sobolev classes of functions on~$\boldsymbol R^n$ JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1988 SP - 147 EP - 155 VL - 181 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1988_181_a8/ LA - ru ID - TM_1988_181_a8 ER -