KSPBCGSL
Implements a slight variant of the Enhanced BiCGStab(L) algorithm in (3) and (2). The variation concerns cases when either kappa0**2 or kappa1**2 is negative due to round-off. Kappa0 has also been pulled out of the denominator in the formula for ghat.
References
1. G.L.G. Sleijpen, H.A. van der Vorst, "An overview of
approaches for the stable computation of hybrid BiCG
methods", Applied Numerical Mathematics: Transactions
f IMACS, 19(3), pp 235-54, 1996.
2. G.L.G. Sleijpen, H.A. van der Vorst, D.R. Fokkema,
"BiCGStab(L) and other hybrid Bi-CG methods",
Numerical Algorithms, 7, pp 75-109, 1994.
3. D.R. Fokkema, "Enhanced implementation of BiCGStab(L)
for solving linear systems of equations", preprint
from www.citeseer.com.
Contributed by: Joel M. Malard, email jm.malard@pnl.gov
Options Database Keys
| -ksp_bcgsl_ell <ell> Number of Krylov search directions | - - -ksp_bcgsl_cxpol Use a convex function of the MR and OR polynomials after the BiCG step
|
| -ksp_bcgsl_xres <res> Threshold used to decide when to refresh computed residuals | -
|
See Also
KSPCreate(), KSPSetType(), KSPType (for list of available types), KSP, KSPFGMRES, KSPBCGS
Level:beginner
Location:src/ksp/ksp/impls/bcgsl/bcgsl.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages