JSci.physics.relativity

Class Rank1Tensor

java.lang.Object

JSci.physics.relativity.Tensor

JSci.physics.relativity.Rank1Tensor

All Implemented Interfaces:

java.io.Serializable, Member

public class Rank1Tensor
extends Tensor

The Rank1Tensor class encapsulates 1st rank tensors.

Version:

1.0

Author:

Mark Hale

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	rank1

Constructor Summary

Constructors

Constructor and Description
Rank1Tensor() Constructs a 1st rank tensor.
Rank1Tensor(double s, double v1, double v2, double v3) Constructs a 1st rank tensor.
Rank1Tensor(double s, DoubleVector v) Constructs a 1st rank tensor.

Method Summary

Methods

Modifier and Type	Method and Description
Rank1Tensor	add(Rank1Tensor t) Returns the addition of this tensor and another.
boolean	equals(java.lang.Object a) Compares two tensors for equality.
double	getComponent(int i) Returns a component of this tensor.
int	hashCode() Returns a hashcode for this tensor.
double	norm() Returns the norm (invariant).
void	setComponent(int i, double x) Sets the value of a component of this tensor.
Rank1Tensor	subtract(Rank1Tensor t) Returns the subtraction of this tensor by another.
Rank2Tensor	tensorProduct(Rank1Tensor t) Returns the tensor product of this tensor and another.
Rank3Tensor	tensorProduct(Rank2Tensor t) Returns the tensor product of this tensor and another.
Rank4Tensor	tensorProduct(Rank3Tensor t) Returns the tensor product of this tensor and another.
java.lang.String	toString() Returns a comma delimited string representing the value of this tensor.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

rank1

protected double[] rank1

Constructor Detail

Rank1Tensor

public Rank1Tensor()

Constructs a 1st rank tensor.

Rank1Tensor

public Rank1Tensor(double s,
           DoubleVector v)

Constructs a 1st rank tensor.

Parameters:

s - a scalar

v - a 3-vector

Rank1Tensor

public Rank1Tensor(double s,
           double v1,
           double v2,
           double v3)

Constructs a 1st rank tensor.

Parameters:

s - a scalar

v1 - 1st 3-vector component

v2 - 2nd 3-vector component

v3 - 3rd 3-vector component

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 1st rank tensor

toString

public java.lang.String toString()

Returns a comma delimited string representing the value of this tensor.

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Returns a hashcode for this tensor.

Overrides:

hashCode in class java.lang.Object

getComponent

public double getComponent(int i)

Returns a component of this tensor.

Parameters:

i - 1st index

Throws:

DimensionException - If attempting to access an invalid component.

setComponent

public void setComponent(int i,
                double x)

Sets the value of a component of this tensor.

Parameters:

i - 1st index

x - value

Throws:

DimensionException - If attempting to access an invalid component.

norm

public double norm()

Returns the norm (invariant).

add

public Rank1Tensor add(Rank1Tensor t)

Returns the addition of this tensor and another.

Parameters:

t - a 1st rank tensor

subtract

public Rank1Tensor subtract(Rank1Tensor t)

Returns the subtraction of this tensor by another.

Parameters:

t - a 1st rank tensor

tensorProduct

public Rank2Tensor tensorProduct(Rank1Tensor t)

Returns the tensor product of this tensor and another.

Parameters:

t - a 1st rank tensor

tensorProduct

public Rank3Tensor tensorProduct(Rank2Tensor t)

Returns the tensor product of this tensor and another.

Parameters:

t - a 2nd rank tensor

tensorProduct

public Rank4Tensor tensorProduct(Rank3Tensor t)

Returns the tensor product of this tensor and another.

Parameters:

t - a 3rd rank tensor