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On the second finest level (with 17 17 grid points) the coarse grid correction to the finest level solution (with 33 33 grid points) is computed. To obtain this, the result of level 17 17 presmoothing and the interpolated level 9 9 coarse grid correction are combined. The result is
Then a single sweep of the Gauß-Seidel method is applied to smooth the result.
This solution is interpolated and combined with the result of the presmoother on the next finer level and becomes the of the result of the V Cycle.
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Ulrich Ruede , Thu Feb 2 21:04:51 MEZ 1995
Updated by Craig C. Douglas