TY - JOUR AU - N. E. Firsova TI - On solution of the Cauchy problem for the Korteweg–de Vries equation with initial data the sum of a periodic and a rapidly decreasing function JO - Sbornik. Mathematics PY - 1989 SP - 257 EP - 265 VL - 63 IS - 1 UR - http://geodesic.mathdoc.fr/item/SM_1989_63_1_a17/ LA - en ID - SM_1989_63_1_a17 ER -