| rtol = relative tolerance, | - . abstol = absolute tolerance. Many br |
| dtol = divergence tolerance, | - - rnorm_0 is the two norm of the right hand side. When initial guess is non-zero you Many brcan call KSPConvergedDefaultSetUIRNorm() to use the norm of (b - A*(initial guess)) Many bras the starting point for relative norm convergence testing, that is as rnorm_0 Many br |
Use KSPSetTolerances() to alter the defaults for rtol, abstol, dtol. Many br
Use KSPSetNormType() (or -ksp_norm_type <none,preconditioned,unpreconditioned,natural>) to change the norm used for computing rnorm Many br
The precise values of reason are macros such as KSP_CONVERGED_RTOL, which are defined in petscksp.h. Many br
This routine is used by KSP by default so the user generally never needs call it directly. Many br
Use KSPSetConvergenceTest() to provide your own test instead of using this one. Many br
Many br
Keywords
KSP, default, convergence, residual
See Also
KSPSetConvergenceTest(), KSPSetTolerances(), KSPConvergedSkip(), KSPConvergedReason, KSPGetConvergedReason(),
KSPConvergedDefaultSetUIRNorm(), KSPConvergedDefaultSetUMIRNorm(), KSPConvergedDefaultCreate(), KSPConvergedDefaultDestroy() Many br
Level:intermediate
Location:src/ksp/ksp/interface/iterativ.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages