KSPCGS#
This code implements the CGS (Conjugate Gradient Squared) method.
Options Database Keys#
see KSPSolve()
References#
**** -*** Sonneveld, 1989.
Notes#
Does not require a symmetric matrix. Does not apply transpose of the matrix. Supports left and right preconditioning, but not symmetric.
Developer Notes#
Has this weird support for doing the convergence test with the natural norm, I assume this works only with no preconditioning and symmetric positive definite operator.
See Also#
KSPCreate()
, KSPSetType()
, KSPType
, KSP
, KSPBCGS
, KSPSetPCSide()
Level#
beginner
Location#
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages