An estimate of accuracy for interpolant numerical solutions of a PDE problem

Gianluca Argentini

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An estimate of accuracy for interpolant numerical solutions of a PDE problem

Gianluca Argentini

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Abstract

In this paper we present an estimate of accuracy for a piecewise polynomial approximation of a classical numerical solution to a non linear differential problem. We suppose the numerical solution U is computed using a grid with a small linear step and interval time Tu, while the polynomial approximation V is an interpolation of the values of a numerical solution on a less fine grid and interval time Tv << Tu. The estimate shows that the interpolant solution V can be, under suitable hypotheses, a good approximation and in general its computational cost is much lower of the cost of the fine numerical solution. We present two possible applications to linear case and periodic case.

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Gianluca Argentini. 2004-12-31. An estimate of accuracy for interpolant numerical solutions of a PDE problem. https://arxiv.org/abs/cs/0412120

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