petsc-master 2018-05-25
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SNESLineSearchBTGetAlpha

Gets the descent parameter, alpha, in the BT linesearch variant.

Synopsis

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

Input Parameters

linesearch -linesearch context

Output Parameters

alpha -The descent parameter

See Also

SNESLineSearchGetLambda(), SNESLineSearchGetTolerances() SNESLINESEARCHBT

Level

intermediate

Location

src/snes/linesearch/impls/bt/linesearchbt.c
Index of all SNES routines
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Index of all manual pages