petsc-3.10.5 2019-03-28
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# PCMAT

A preconditioner obtained by multiplying by the preconditioner matrix supplied in PCSetOperators() or KSPSetOperators()

### Notes

This one is a little strange. One rarely has an explict matrix that approximates the inverse of the matrix they wish to solve for.

### See Also

PCCreate(), PCSetType(), PCType (for list of available types), PC,
PCSHELL

### Level

intermediate

### Location

src/ksp/pc/impls/mat/pcmat.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages