Download E-books A cascadic multigrid algorithm for semilinear elliptic problems PDF

By Timmermann G.

We advise a cascadic multigrid set of rules for a semilinear elliptic challenge. The nonlinear equations coming up from linear finite point discretizations are solved by way of Newton's process. Given an approximate answer at the coarsest grid on every one finer grid we practice precisely one Newton step taking the approximate resolution from the former grid as preliminary bet. The Newton platforms are solved iteratively via a suitable smoothing strategy. We end up that the set of rules yields an approximate resolution in the discretization mistakes at the most interesting grid only if the beginning approximation is satisfactorily actual and that the preliminary grid dimension is satisfactorily small. additionally, we exhibit that the tactic has multigrid complexity.

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