SNESLineSearchSetVIFunctions#
Sets VI-specific functions for line search computation.
Synopsis#
#include "petscsnes.h"
PetscErrorCode SNESLineSearchSetVIFunctions(SNESLineSearch linesearch, SNESLineSearchVIProjectFn *projectfunc, SNESLineSearchVINormFn *normfunc)
Logically Collective
Input Parameters#
linesearch - the linesearch object
projectfunc - function for projecting the function to the bounds, see
SNESLineSearchVIProjectFnfor calling sequencenormfunc - function for computing the norm of an active set, see
SNESLineSearchVINormFnfor 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(),
SNESLineSearchVIProjectFn, SNESLineSearchVINormFn
Level#
advanced
Location#
src/snes/linesearch/interface/linesearch.c
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