A TWO-GRID FINITE ELEMENT APPROXIMATION FOR NONLINEAR TIME FRACTIONAL TWO-TERM MIXED SUB-DIFFUSION AND DIFFUSION WAVE EQUATIONS

Yanping Chen, Qiling Gu, Qingfeng Li, Yunqing Huang

Journal of Computational Mathematics . 2022, (6): 936 -954 . DOI: 10.4208/jcm.2104-m2020-0332