-ksp_chebychev_eigenvalues <emin,emax> -set approximations to the smallest and largest eigenvalues
of the preconditioned operator. If these are accurate you will get much faster convergence.
Notes: The Chebychev method requires both the matrix and preconditioner to
be symmetric positive (semi) definite.
Only support for left preconditioning.
See Also
KSPCreate(), KSPSetType(), KSPType (for list of available types), KSP,
KSPChebychevSetEigenvalues(), KSPRICHARDSON, KSPCG
Level:beginner
Location:src/ksp/ksp/impls/cheby/cheby.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages