TY - JOUR AU - S. N. Kudryavtsev TI - On~approximations of compact sets of functions by algebraic surfaces JO - Izvestiya. Mathematics PY - 1986 SP - 521 EP - 533 VL - 27 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1986_27_3_a4/ LA - en ID - IM2_1986_27_3_a4 ER -