SUPERCONVERGENCE ANALYSIS OF A BDF-GALERKIN FEM FOR THE NONLINEAR KLEIN-GORDON-SCHRÖDINGER EQUATIONS WITH DAMPING MECHANISM

Dongyang Shi, Houchao Zhang

Journal of Computational Mathematics . 2023, (2): 224 -245 . DOI: 10.4208/jcm.2108-m2020-0324