petsc-3.7.1 2016-05-15
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KSPSetDiagonalScaleFix

Tells KSP to diagonally scale the system back after solving.

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPSetDiagonalScaleFix(KSP ksp,PetscBool fix)
Logically Collective on KSP Many br

Input Parameter

ksp - the KSP context Many br
fix - PETSC_TRUE to scale back after the system solve, PETSC_FALSE to not Many brrescale (default) Many br

Notes

Must be called after KSPSetDiagonalScale() Many br

Using this will slow things down, because it rescales the matrix before and Many brafter each linear solve. This is intended mainly for testing to allow one Many brto easily get back the original system to make sure the solution computed is Many braccurate enough. Many br

Many br

Keywords

KSP, set, options, prefix, database

See Also

KSPGetDiagonalScale(), KSPSetDiagonalScale(), KSPGetDiagonalScaleFix()

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