ASYMPTOTIC EXPANSIONS AND SUPERCONVERGENCE OF F.E.M.FOR PARABOLIC EQUATIONS
Yumei Huang, Qing Lin · 1991
We consider the intial-boundary value problems approximated by F.E.M.with piecewiselinear elements.The asymptotic expansion of the error and superconvergence for the gradientare obtained in L_∞-norm for the equations with time-dependant coefficients.