KSPBCGSLSetXRes#
Sets the parameter governing when exact residuals will be used instead of computed residuals for KSPCBGSL.
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPBCGSLSetXRes(KSP ksp, PetscReal delta)
Logically Collective
Input Parameters#
ksp - iterative context of type
KSPBCGSLdelta - computed residuals are used alone when delta is not positive
Options Database Key#
-ksp_bcgsl_xres delta - Threshold used to decide when to refresh computed residuals
See Also#
KSP: Linear System Solvers, KSPBCGSLSetEll(), KSPBCGSLSetPol(), KSP, KSPCBGSL, KSPBCGSLSetUsePseudoinverse()
Level#
intermediate
Location#
src/ksp/ksp/impls/bcgsl/bcgsl.c
Index of all KSP routines
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Index of all manual pages