JSci.physics.relativity
Class Rank2Tensor

java.lang.Object
  JSci.physics.relativity.Tensor
      JSci.physics.relativity.Rank2Tensor

All Implemented Interfaces:

Member, java.io.Serializable

Direct Known Subclasses:

EMFieldTensor, KroneckerDelta, LorentzBoost, MinkowskiMetric

public class Rank2Tensor

extends Tensor

The Rank2Tensor class encapsulates 2nd rank tensors.

See Also:

Serialized Form

Field Summary

protected double[][]

rank2

Constructor Summary

Rank2Tensor()
Constructs a 2nd rank tensor.

Method Summary

Rank2Tensor	add(Rank2Tensor 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) Returns a component of this tensor.
Rank1Tensor	multiply(Rank1Tensor t) Returns the multiplication of this tensor by another.
void	setComponent(int i, int j, double x) Sets the value of a component of this tensor.
Rank2Tensor	subtract(Rank2Tensor t) Returns the subtraction of this tensor by another.
Rank3Tensor	tensorProduct(Rank1Tensor t) Returns the tensor product of this tensor and another.
Rank4Tensor	tensorProduct(Rank2Tensor t) Returns the tensor product of this tensor and another.

Methods inherited from class java.lang.Object

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

Field Detail

rank2

protected double[][] rank2

Constructor Detail

Rank2Tensor

public Rank2Tensor()

Constructs a 2nd rank tensor.

Method Detail

equals

public boolean equals(java.lang.Object a)

Compares two tensors for equality.

Parameters:

a - a 2nd rank tensor

getComponent

public double getComponent(int i,
                           int j)

Returns a component of this tensor.

Parameters:

i - 1st index

j - 2nd index

Throws:

DimensionException - If attempting to access an invalid component.

setComponent

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

Sets the value of a component of this tensor.

Parameters:

i - 1st index

j - 2nd index

x - value

Throws:

DimensionException - If attempting to access an invalid component.

add

public Rank2Tensor add(Rank2Tensor t)

Returns the addition of this tensor and another.

Parameters:

t - a 2nd rank tensor

subtract

public Rank2Tensor subtract(Rank2Tensor t)

Returns the subtraction of this tensor by another.

Parameters:

t - a 2nd rank tensor

multiply

public Rank1Tensor multiply(Rank1Tensor t)

Returns the multiplication of this tensor by another.

Parameters:

t - a 1st rank tensor

tensorProduct

public Rank3Tensor tensorProduct(Rank1Tensor t)

Returns the tensor product of this tensor and another.

Parameters:

t - a 1st rank tensor

tensorProduct

public Rank4Tensor tensorProduct(Rank2Tensor t)

Returns the tensor product of this tensor and another.

Parameters:

t - a 2nd rank tensor