PCAIRGetPolyCoeffs#

Returns the polynomial coefficients stored by PCAIR for a given level and inverse after the last PCSetUp()

Synopsis#

PETSC_EXTERN PetscErrorCode PCAIRGetPolyCoeffs(PC pc, PetscInt petsc_level, int which_inverse, PetscReal **coeffs_ptr, PetscInt *row_size, PetscInt *col_size)

Not Collective

Input Parameters#

pc - the PCAIR preconditioner context
petsc_level - the level in the hierarchy
which_inverse - which inverse’s coefficients to return, one of COEFFS_INV_AFF, COEFFS_INV_AFF_DROPPED, COEFFS_INV_ACC, or COEFFS_INV_COARSE

Output Parameters#

coeffs_ptr - pointer to the array of polynomial coefficients
row_size - the number of rows in the coefficient array
col_size - the number of columns in the coefficient array

Note#

This routine returns a pointer into the PCAIR 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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