SUB-OPTIMAL CONVERGENCE OF DISCONTINUOUS GALERKIN METHODS WITH CENTRAL FLUXES FOR LINEAR HYPERBOLIC EQUATIONS WITH EVEN DEGREE POLYNOMIAL APPROXIMATIONS

Yong Liu, Chi-Wang Shu, Mengping Zhang

Journal of Computational Mathematics . 2021, (4): 518 -537 . DOI: 10.4208/jcm.2003-m2018-0305