outerSoftAbsMetric Class Reference

#include <outerSoftAbsMetric.h>

Inheritance diagram for outerSoftAbsMetric:

List of all members.

Public Member Functions
	outerSoftAbsMetric (int dim)
double	T ()
	Return the kinetic energy.
double	tau ()
	Return the quadratic form of the kinetic energy.
void	bounceP (const VectorXd &normal)
void	sampleP (Random &random)
void	setSoftAbsAlpha (double a)
	Set the SoftAbs regularization coefficient.
void	checkEvolution (const double epsilon=1e-6)
	Comparing the evolution implementations with finite differences.
void	prepareEvolution ()
Protected Member Functions
VectorXd &	fLambdaDot (const VectorXd &v)
	Compute the product of Lambda and v efficiently.
virtual void	fComputeH ()=0
	Compute the Hessian matrix of the potential.
void	fComputeMetric ()
	Compute the metric at the current position.
void	fPrepareSpatialGradients ()
VectorXd &	dTaudp ()
	Gradient of the quadrtic form with respect to the momenta.
VectorXd &	dTaudq ()
	Gradient of the quadratic form with respect to the position.
VectorXd &	dPhidq ()
	Compute the gradient of the log determinant of the inverse induced metric.
Protected Attributes
double	mSoftAbsAlpha
	Regualarization coefficient.
MatrixXd	mH
	Hessian of the potential energy.

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Detailed Description

Author:

Michael Betancourt

Abstract base class defining the interface for a Hamiltonian defined on a Riemannian manifold with an outer-product approximation to the SoftAbs Metric

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Constructor & Destructor Documentation

outerSoftAbsMetric::outerSoftAbsMetric

(

int

dim

)

[explicit]

Constructor

Parameters:

dim	Dimension of the target space

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Member Function Documentation

void outerSoftAbsMetric::bounceP

(

const VectorXd &

normal

)

[virtual]

Evolve the momentum through a bounce off of a constraint surface

Parameters:

normal

Vector normal to constraint surface

Implements baseHamiltonian.

void outerSoftAbsMetric::checkEvolution

(

const double

epsilon = 1e-6

)

[virtual]

Comparing the evolution implementations with finite differences.

Compare the position and momentum evolution implementations with finite differences

Parameters:

epsilon

Size of finite difference step

Reimplemented from baseHamiltonian.

void outerSoftAbsMetric::fPrepareSpatialGradients

(

)

[inline, protected, virtual]

Update any position-dependent auxiliary terms in preparation for spatial gradients

Reimplemented from dynamMetric.

void outerSoftAbsMetric::prepareEvolution

(

)

[inline, virtual]

Perform any necessary calculations before simulation Hamiltonian dynamics

Reimplemented from dynamMetric.

void outerSoftAbsMetric::sampleP

(

Random &

random

)

[virtual]

Sample the momentum from the conditional distribution

Parameters:

random

External RandomLib generator

Implements baseHamiltonian.

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

• base/outerSoftAbsMetric.h
• base/outerSoftAbsMetric.cpp