petsc-3.10.5 2019-03-28
KSPSetComputeSingularValues
Sets a flag so that the extreme singular values will be calculated via a Lanczos or Arnoldi process as the linear system is solved.
Synopsis
#include "petscksp.h"
PetscErrorCode KSPSetComputeSingularValues(KSP ksp,PetscBool flg)
Logically Collective on KSP
Input Parameters
Options Database Key
-ksp_monitor_singular_value -Activates KSPSetComputeSingularValues()
Notes
Currently this option is not valid for all iterative methods.
Many users may just want to use the monitoring routine
KSPMonitorSingularValue() (which can be set with option -ksp_monitor_singular_value)
to print the singular values at each iteration of the linear solve.
Keywords
set, compute, singular values
See Also
KSPComputeExtremeSingularValues(), KSPMonitorSingularValue(), KSP
Level
advanced
Location
src/ksp/ksp/interface/itfunc.c
Examples
src/ksp/ksp/examples/tutorials/ex56.c.html
src/snes/examples/tutorials/ex30.c.html
src/snes/examples/tutorials/ex56.c.html
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages