PCPFLAREINVGetInverseMat#

Returns the underlying matrix that represents the PCPFLAREINV approximate inverse

Synopsis#

PetscErrorCode PCPFLAREINVGetInverseMat(PC pc, Mat *mat)

Not Collective

Input Parameter#

pc - the PCPFLAREINV preconditioner context

Output Parameter#

mat - the approximate inverse matrix, either an assembled matrix (for example MATAIJ or MATDIAGONAL) or a matrix-free MATSHELL, depending on the inverse type and the matrix-free setting

Note#

This is a borrowed reference into the PCPFLAREINV object - do not destroy it. It is only valid until the next PCSetUp(), PCReset(), or PCDestroy() (a re-setup with a different nonzero pattern rebuilds it), and is NULL before PCSetUp() (or KSPSetUp()) has been called.

Level#

advanced

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