slepc-main 2024-11-22
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MFNSetTolerances

Sets the tolerance and maximum iteration count used by the MFN convergence tests.

Synopsis

#include "slepcmfn.h" 
PetscErrorCode MFNSetTolerances(MFN mfn,PetscReal tol,PetscInt maxits)
Logically Collective

Input Parameters

mfn  - the matrix function context
tol  - the convergence tolerance
maxits  - maximum number of iterations to use

Options Database Keys

-mfn_tol <tol>  - Sets the convergence tolerance
-mfn_max_it <maxits>  - Sets the maximum number of iterations allowed

Notes

Use PETSC_CURRENT to retain the current value of any of the parameters. Use PETSC_DETERMINE for either argument to assign a default value computed internally (may be different in each solver). For maxits use PETSC_UMLIMITED to indicate there is no upper bound on this value.

See Also

MFNGetTolerances()

Level

intermediate

Location

src/mfn/interface/mfnopts.c

Examples

src/mfn/tutorials/ex23.c
src/mfn/tutorials/ex23f.F90


Index of all MFN routines
Table of Contents for all manual pages
Index of all manual pages