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Class JSci.physics.relativity.Rank4Tensor 

java.lang.Object
   |
   +----JSci.physics.relativity.Tensor
           |
           +----JSci.physics.relativity.Rank4Tensor
public class Rank4Tensor
extends Tensor
The Rank4Tensor class encapsulates 4th rank tensors.

Variable Index

o rank4

Constructor Index

o Rank4Tensor()
Constructs a 4th rank tensor.

Method Index

o add(Rank4Tensor)
Returns the addition of this tensor and another.
o equals(Object)
Compares two tensors for equality.
o getComponent(int, int, int, int)
Returns a component of this tensor.
o setComponent(int, int, int, int, double)
Sets the value of a component of this tensor.
o subtract(Rank4Tensor)
Returns the subtraction of this tensor by another.

Variables

o rank4 
 protected double rank4[][][][]

Constructors

o Rank4Tensor 
 public Rank4Tensor()
Constructs a 4th rank tensor.

Methods

o equals 
 public boolean equals(Object a)
Compares two tensors for equality.

Parameters:
a - a 4th rank tensor
Overrides:
equals in class Object
o 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.
o 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.
o add 
 public Rank4Tensor add(Rank4Tensor t)
Returns the addition of this tensor and another.

Parameters:
t - a 4th rank tensor
o subtract 
 public Rank4Tensor subtract(Rank4Tensor t)
Returns the subtraction of this tensor by another.

Parameters:
t - a 4th rank tensor 
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