TY - JOUR AU - Ghidaglia, J. M. TI - Explicit upper and lower bounds on the number of degrees of freedom for damped and driven cubic Schrödinger equations JO - ESAIM: Modélisation mathématique et analyse numérique PY - 1989 SP - 433 EP - 443 VL - 23 IS - 3 PB - AFCET - Gauthier-Villars PP - Paris UR - http://www.numdam.org/item/M2AN_1989__23_3_433_0/ LA - en ID - M2AN_1989__23_3_433_0 ER -