petsc-3.8.4 2018-03-24

KSPGetDiagonalScale

Checks if KSP solver scales the matrix and right hand side

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPGetDiagonalScale(KSP ksp,PetscBool  *scale)

Not Collective

Input Parameter

ksp -the KSP context

Output Parameter

scale -PETSC_TRUE or PETSC_FALSE

Notes

BE CAREFUL with this routine: it actually scales the matrix and right hand side that define the system. After the system is solved the matrix and right hand side remain scaled unless you use KSPSetDiagonalScaleFix()

Keywords