petsc-dev 2014-07-25
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SNESNGSSetTolerances

Sets various parameters used in convergence tests.

Synopsis

#include "petscsnes.h"  
PetscErrorCode  SNESNGSSetTolerances(SNES snes,PetscReal abstol,PetscReal rtol,PetscReal stol,PetscInt maxit)
Logically Collective on SNES

Input Parameters

snes - the SNES context
abstol - absolute convergence tolerance
rtol - relative convergence tolerance
stol - convergence tolerance in terms of the norm of the change in the solution between steps, || delta x || < stol*|| x ||
maxit - maximum number of iterations

Options Database Keys

-snes_ngs_atol <abstol> - Sets abstol
-snes_ngs_rtol <rtol> - Sets rtol
-snes_ngs_stol <stol> - Sets stol
-snes_max_it <maxit> - Sets maxit

Keywords

SNES, nonlinear, gauss-seidel, set, convergence, tolerances

See Also

SNESSetTrustRegionTolerance()

Level:intermediate
Location:
src/snes/impls/gs/snesgs.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages