JSci.physics.relativity

Class Rank4Tensor

java.lang.Object

JSci.physics.relativity.Tensor

JSci.physics.relativity.Rank4Tensor

All Implemented Interfaces:

java.io.Serializable, Member

Direct Known Subclasses:

LeviCivita

public class Rank4Tensor
extends Tensor

The Rank4Tensor class encapsulates 4th rank tensors.

Version:

1.0

Author:

Mark Hale

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double[][][][]	rank4

Constructor Summary

Constructors

Constructor and Description
Rank4Tensor() Constructs a 4th rank tensor.

Method Summary

Methods

Modifier and Type	Method and Description
Rank4Tensor	add(Rank4Tensor t) Returns the addition of this tensor and another.
boolean	equals(java.lang.Object a) Compares two tensors for equality.
double	getComponent(int i, int j, int k, int l) Returns a component of this tensor.
void	setComponent(int i, int j, int k, int l, double x) Sets the value of a component of this tensor.
Rank4Tensor	subtract(Rank4Tensor t) Returns the subtraction of this tensor by another.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

rank4

protected double[][][][] rank4

Constructor Detail

Rank4Tensor

public Rank4Tensor()

Constructs a 4th rank tensor.

Method Detail

equals

public boolean equals(java.lang.Object a)

Compares two tensors for equality.

Overrides:

equals in class java.lang.Object

Parameters:

a - a 4th rank tensor

getComponent

public double getComponent(int i,
                  int j,
                  int k,
                  int l)

Returns a component of this tensor.

Parameters:

i - 1st index

j - 2nd index

k - 3rd index

l - 4th index

Throws:

DimensionException - If attempting to access an invalid component.

setComponent

public void setComponent(int i,
                int j,
                int k,
                int l,
                double x)

Sets the value of a component of this tensor.

Parameters:

i - 1st index

j - 2nd index

k - 3rd index

l - 4th index

x - value

Throws:

DimensionException - If attempting to access an invalid component.

add

public Rank4Tensor add(Rank4Tensor t)

Returns the addition of this tensor and another.

Parameters:

t - a 4th rank tensor

subtract

public Rank4Tensor subtract(Rank4Tensor t)

Returns the subtraction of this tensor by another.

Parameters:

t - a 4th rank tensor