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/ex16.c
src/snes/tutorials/ex5.c
src/snes/tutorials/ex19.c
src/snes/tutorials/ex55.c
src/snes/tutorials/ex15.c

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