A Mass-Preserving Two-Step Lagrange–Galerkin Scheme for Convection-Diffusion Problems

A mass-preserving two-step Lagrange–Galerkin scheme of second order in time for convection-diffusion problems is presented, and convergence with optimal error estimates is proved in the framework of L 2 -theory. The introduced scheme maintains the advantages of the Lagrange–Galerkin method, i.e., CF...

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