KSPGMRESModifiedGramSchmidtOrthogonalization#
This is the basic orthogonalization routine using modified Gram-Schmidt.
Synopsis#
Collective on ksp
Input Parameters#
ksp - KSP object, must be associated with GMRES, FGMRES, or LGMRES Krylov method
its - one less then the current GMRES restart iteration, i.e. the size of the Krylov space
Options Database Keys#
-ksp_gmres_modifiedgramschmidt - Activates
KSPGMRESModifiedGramSchmidtOrthogonalization()
Notes#
In general this is much slower than KSPGMRESClassicalGramSchmidtOrthogonalization()
but has better stability properties.
See Also#
KSPGMRESSetOrthogonalization()
, KSPGMRESClassicalGramSchmidtOrthogonalization()
, KSPGMRESGetOrthogonalization()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex5f.F90.html
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages