petsc-3.11.4 2019-09-28
KSPTFQMR
A transpose free QMR (quasi minimal residual),
Options Database Keys
see KSPSolve() -
Notes
Supports left and right preconditioning, but not symmetric
The "residual norm" computed in this algorithm is actually just an upper bound on the actual residual norm.
That is for left preconditioning it is a bound on the preconditioned residual and for right preconditioning
it is a bound on the true residual.
References
1. -Freund, 1993
See Also
KSPCreate(), KSPSetType(), KSPType (for list of available types), KSP, KSPTCQMR
Level
beginner
Location
src/ksp/ksp/impls/tfqmr/tfqmr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages