KSPCGSetRadius#

Sets the radius of the trust region

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPCGSetRadius(KSP ksp, PetscReal radius)

Logically Collective

Input Parameters#

ksp - the iterative context
radius - the trust region radius (0 is the default that disable the use of the radius)

Note#

When radius is greater then 0, the Steihaugh-Toint trick is used

See Also#

KSP: Linear System Solvers, KSP, KSPCG, KSPNASH, KSPSTCG, KSPGLTR

Level#

advanced

Location#

src/ksp/ksp/impls/cg/cgtype.c

Implementations#

KSPCGSetRadius_CG in src/ksp/ksp/impls/cg/cg.c
KSPCGSetRadius_GLTR in src/ksp/ksp/impls/cg/gltr/gltr.c
KSPCGSetRadius_NASH in src/ksp/ksp/impls/cg/nash/nash.c
KSPCGSetRadius_STCG in src/ksp/ksp/impls/cg/stcg/stcg.c

Index of all KSP routines
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Index of all manual pages