petsc-3.12.5 2020-03-29

MatFactorInvertSchurComplement

Invert the Schur complement matrix computed during the factorization step

#include "petscmat.h" 
PetscErrorCode MatFactorInvertSchurComplement(Mat F)

Logically Collective on Mat

F -the factored matrix obtained by calling MatGetFactor()

Must be called after MatFactorSetSchurIS().

Call MatFactorGetSchurComplement() or MatFactorCreateSchurComplement() AFTER this call to actually compute the inverse and get access to it.

advanced