SNESNewtonTRSetTolerances#

Sets the trust region parameter tolerances.

Synopsis#

#include "petscsnes.h"   
PetscErrorCode SNESNewtonTRSetTolerances(SNES snes, PetscReal delta_min, PetscReal delta_max, PetscReal delta_0)

Logically Collective

Input Parameters#

snes - the SNES context
delta_min - minimum allowed trust region size
delta_max - maximum allowed trust region size
delta_0 - initial trust region size

Options Database Key#

-snes_tr_deltamin - Set minimum size
-snes_tr_deltamax - Set maximum size
-snes_tr_delta0 - Set initial size

Note#

Use PETSC_DETERMINE to use the default value for the given SNES. Use PETSC_CURRENT to retain a value.

Fortran Note#

Use PETSC_DETERMINE_REAL, PETSC_CURRENT_REAL

See Also#

SNES: Nonlinear Solvers, SNES, SNESNEWTONTR, SNESNewtonTRGetTolerances()

Level#

intermediate

Location#

src/snes/impls/tr/tr.c

Implementations#

SNESNewtonTRSetTolerances_TRDC() in src/snes/impls/ntrdc/ntrdc.c
SNESNewtonTRSetTolerances_TR() in src/snes/impls/tr/tr.c

Index of all SNES routines
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Index of all manual pages