Journal
NUMERICAL ALGORITHMS
Volume 43, Issue 4, Pages 295-308Publisher
SPRINGER
DOI: 10.1007/s11075-006-9061-3
Keywords
soliton; sine-Gordon; finite-diff erence method; predictor-corrector
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A three-time level finite-difference scheme based on a fourth order in time and second order in space approximation has been proposed for the numerical solution of the nonlinear two-dimensional sine-Gordon equation. The method, which is analysed for local truncation error and stability, leads to the solution of a nonlinear system. To avoid solving it, a predictor-corrector scheme using as predictor a second-order explicit scheme is proposed. The procedure of the corrector has been modified by considering as known the already evaluated corrected values instead of the predictor ones. This modified scheme has been tested on the line and circular ring soliton and the numerical experiments have proved that there is an improvement in the accuracy over the standard predictor-corrector implementation.
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