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Indirect methods of collocation: Trefftz‐Herrera collocation

Numerical Methods for Partial Differential Equations, 1999
Summary: A nonstandard collocation method (TH-collocation) is presented, where collocation is used to construct specialized weighting functions instead of the solution itself, as it is usual, so that in this sense it is an indirect method. TH-collocation is shown to be as accurate as standard collocation, but computationally far more efficient.
Herrera, Ismael, Díaz, Martín
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