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On the design of nested iterations for elliptic difference equations

1972; Springer Science+Business Media; Volume: 12; Issue: 1 Linguagem: Inglês

10.1007/bf01932674

1572-9125

Lydia Kronsjö, Germund Dahlquist,

Numerical methods for differential equations

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.