SNESLineSearchSetVIFunctions

Sets VI-specific functions for line search computation.

Synopsis

#include "petscsnes.h" 
PetscErrorCode SNESLineSearchSetVIFunctions(SNESLineSearch linesearch, SNESLineSearchVIProjectFunc projectfunc, SNESLineSearchVINormFunc normfunc)

Logically Collective

Input Parameters

• linesearch - the linesearch object

• projectfunc - function for projecting the function to the bounds, see SNESLineSearchSetVIFunctions for calling sequence

• normfunc - function for computing the norm of an active set, see SNESLineSearchSetVIFunctions for calling sequence

Notes

The VI solvers require projection of the solution to the feasible set. projectfunc should implement this.

The VI solvers require special evaluation of the function norm such that the norm is only calculated on the inactive set. This should be implemented by normfunc.

See Also

SNES: Nonlinear Solvers, SNES, SNESLineSearch, SNESLineSearchGetVIFunctions(), SNESLineSearchSetPostCheck(), SNESLineSearchSetPreCheck()

Level

advanced

Location

src/snes/linesearch/interface/linesearch.c

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