NOX::LineSearch::Generic Class Reference

Generic line search interface More...

#include <NOX_LineSearch_Generic.H>

Inheritance diagram for NOX::LineSearch::Generic:


Public Member Functions
	Generic ()
	Default constructor.
virtual	~Generic ()
	Destructor.
virtual bool	reset (const Teuchos::RefCountPtr< NOX::GlobalData > &gd, Teuchos::ParameterList &params)=0
	Reset parameters.
virtual bool	compute (NOX::Abstract::Group &grp, double &step, const NOX::Abstract::Vector &dir, const NOX::Solver::Generic &s)=0
	Perform a line search.

Detailed Description

Generic line search interface

Every line search should respect the following Parameter:

virtual bool NOX::LineSearch::Generic::compute ( NOX::Abstract::Group & grp,

double & step,

const NOX::Abstract::Vector & dir,

const NOX::Solver::Generic & s

) [pure virtual]

Perform a line search.
Let

$x_{\rm new}$ denotes the new solution to be calculated (corresponding to grp)
$\lambda$ denotes the step to be calculated (step),
$d$ denotes the search direction (dir).
$x_{\rm old}$ denotes the previous solution (i.e., the result of s.getPreviousSolutionGroup().getX())

In the end, we should have computed $\lambda$ and updated grp so that
$x_{\rm new} = x_{\rm old} + \lambda d.$

Ideally, $\|F(x_{\rm new})\| < \|F(x_{\rm old})\|$ .
Implemented in NOX::LineSearch::Backtrack, NOX::LineSearch::FullStep, NOX::LineSearch::Manager, NOX::LineSearch::MoreThuente, NOX::LineSearch::NonlinearCG, and NOX::LineSearch::Polynomial.

The documentation for this class was generated from the following file:

Generated on Thu Sep 18 12:38:39 2008 for NOX by

1.3.9.1