PCPFLAREINVGetPolyCoeffs#

Returns the polynomial coefficients stored by PCPFLAREINV after the last PCSetUp()

Synopsis#

PetscErrorCode PCPFLAREINVGetPolyCoeffs(PC pc, PetscReal **coeffs, PetscInt *rows, PetscInt *cols)

Not Collective

Input Parameter#

pc - the PCPFLAREINV preconditioner context

Output Parameters#

coeffs - pointer to the column-major array of polynomial coefficients
rows - the number of rows, equal to the polynomial order plus one
cols - the number of columns, 1 for the power, Arnoldi, and Neumann inverse types, or 2 for the Newton types

Note#

This routine returns a pointer into the PCPFLAREINV object itself, valid only until the next PCSetUp() or PCReset() call; copy the coefficients yourself if you need to save or restore them later. This differs from the Fortran interface to this routine, which returns a copy in an allocatable array that knows its own size.

Level#

advanced

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