petsc-3.9.2 2018-05-20
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SNESLineSearchBTSetAlpha

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

Synopsis

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

Input Parameters

linesearch - linesearch context
alpha - The descent parameter

See Also

SNESLineSearchSetLambda(), 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