petsc-3.8.4 2018-03-24
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KSPQCGGetTrialStepNorm

 Gets the norm of a trial step vector. The WCG step may be constrained, so this is not necessarily the length of the ultimate step taken in QCG.

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPQCGGetTrialStepNorm(KSP ksp,PetscReal *tsnorm)
Not Collective

Input Parameter

ksp -the iterative context

Output Parameter

tsnorm -the norm

Level:advanced
Location:src/ksp/ksp/impls/qcg/qcg.c
Index of all KSP routines
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Index of all manual pages