SNESSetTolerances#

Sets SNES various parameters used in convergence tests.

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESSetTolerances(SNES snes, PetscReal abstol, PetscReal rtol, PetscReal stol, PetscInt maxit, PetscInt maxf)

Logically Collective

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, default 50.

  • maxf - maximum number of function evaluations (-1 indicates no limit), default 1000

Options Database Keys#

  • -snes_atol - Sets abstol

  • -snes_rtol - Sets rtol

  • -snes_stol - Sets stol

  • -snes_max_it - Sets maxit

  • -snes_max_funcs - Sets maxf

See Also#

SNES: Nonlinear Solvers, SNESolve(), SNES, SNESSetTrustRegionTolerance(), SNESSetDivergenceTolerance(), SNESSetForceIteration()

Level#

intermediate

Location#

src/snes/interface/snes.c

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Index of all SNES routines
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Index of all manual pages