SNESLineSearchBTGetAlpha#

Gets the descent parameter, alpha, in the SNESLINESEARCHBT variant that was set with SNESLineSearchBTSetAlpha()

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESLineSearchBTGetAlpha(SNESLineSearch linesearch, PetscReal *alpha)

Input Parameter#

  • linesearch - linesearch context

Output Parameter#

  • alpha - The descent parameter

See Also#

SNES: Nonlinear Solvers, SNESLineSearch, SNESLineSearchGetLambda(), SNESLineSearchGetTolerances() SNESLINESEARCHBT, SNESLineSearchBTSetAlpha()

Level#

intermediate

Location#

src/snes/linesearch/impls/bt/linesearchbt.c


Index of all SNES routines
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