SNESNGSGetTolerances

Gets various parameters used in convergence tests for nonlinear Gauss-Seidel SNESNCG

Synopsis

#include "petscsnes.h"  
PetscErrorCode SNESNGSGetTolerances(SNES snes, PetscReal *atol, PetscReal *rtol, PetscReal *stol, PetscInt *maxit)

Not Collective

Input Parameters

• snes - the SNES context

• atol - absolute convergence tolerance

• rtol - relative convergence tolerance

• stol - convergence tolerance in terms of the norm of the change in the solution between steps

• maxit - maximum number of iterations

Note

The user can specify NULL for any parameter that is not needed.

See Also

SNES: Nonlinear Solvers, SNES, SNESNCG, SNESSetTolerances()

Level

intermediate

Location

src/snes/impls/gs/snesgs.c

Examples

src/snes/tutorials/ex19.c
src/snes/tutorials/ex15.c
src/snes/tutorials/ex55.c
src/snes/tutorials/ex5.c

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