[petsc-users] removing small entries from a sparse matrix

[Dominik Szczerba]

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Is it possible to remove small (subject to given tol) entries in my
sparse coefficient matrix after the values have been set (added)? I have
a highly convective problem where I ask myself what's better, keep lots
of explicit zeros to rescue constant non-zero pattern or eliminate the
near-zero entries.
Dominik
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