A pivoted QR algorithm selects sparse stencils for meshless finite difference methods, with a proven error bound that the sparsified stencil remains comparable in accuracy to the full set.
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Selection of Sparse Sets of Influence for Meshless Finite Difference Methods
A pivoted QR algorithm selects sparse stencils for meshless finite difference methods, with a proven error bound that the sparsified stencil remains comparable in accuracy to the full set.