petsc-3.13.6 2020-09-29
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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()

See Also

KSPSetDiagonalScale(), KSPSetDiagonalScaleFix(), KSP

Level

intermediate

Location

src/ksp/ksp/interface/itfunc.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages