On the design of nested iterations for elliptic difference equations
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By “Richardson extrapolation from 2h andh toh/2” the results of computations with coarse grids are used for the construction of an initial approximation on finer grid. After a rather small number of iterations high accuracy is obtained. Numerical results are given for the two-dimensional Laplace equation.
KeywordsComputational Mathematic Difference Equation Initial Approximation Laplace Equation Coarse Grid
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