petsc-3.14.6 2021-03-30
KSPCGS
This code implements the CGS (Conjugate Gradient Squared) method.
Options Database Keys
References
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 (for list of available types), KSP, KSPBCGS, KSPSetPCSide()
Level
beginner
Location
src/ksp/ksp/impls/cgs/cgs.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages