KSPComputeExplicitOperator

Computes the explicit preconditioned operator.

Synopsis

int KSPComputeExplicitOperator(KSP ksp, Mat *mat)
Collective on KSP

Input Parameter

ksp -the Krylov subspace context

Output Parameter

mat -the explict preconditioned operator

Notes

This computation is done by applying the operators to columns of theidentity matrix.

Currently, this routine uses a dense matrix format when 1 processoris used and a sparse format otherwise. This routine is costly in general, and is recommended for use only with relatively small systems. .keywords: KSP, compute, explicit, operator

See Also

KSPComputeEigenvaluesExplicitly()

Location: src/ksp/interface/eige.c
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