TY - JOUR AU - Yu. A. Neretin TI - A complex semigroup that contains the group of diffeomorphisms of the circle JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1987 SP - 82 EP - 83 VL - 21 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1987_21_2_a14/ LA - ru ID - FAA_1987_21_2_a14 ER -