// FILE. . . . . d:/hak/hlt/src/hlt/math/matrix/sources/GenMatrix.java
// EDIT BY . . . Hassan Ait-Kaci
// ON MACHINE. . Hak-Laptop
// STARTED ON. . Tue Dec 3 13:47:39 2019
/**
* @version Last modified on Thu Dec 12 11:14:08 2019 by hak
* @author Hassan Aït-Kaci
* @copyright © by the author
*/
package hlt.math.matrix;
/**
* package hlt.math.matrix
* documentation listing
*/
import hlt.language.tools.Misc;
/**
* This is a generic class meant to be subclassed by a class
* representing and manipulating 2D matrices of double entries,
* with sum, product, difference, and
* negation operations on the double entries that are
* defined by a concrete subclass of the generic (abstract) class
* NumberAlgebra. This gives the flexibility to define matrix
* operations in terms various algebras on doubles
* (+/×, Math.max/Math.min,
* etc.).
*
*
*
*
*
* Contents (package hlt.math.matrix
* documentation listing)
*
*
*
*
* @see Matrix
* @see NumberAlgebra
* @see StandardAlgebra
*/
public class GenMatrix
{
/**
*
*/
/**
* Constructs a vacuous GenMatrix using the default
* NumberAlgebra (StandardAlgebra).
*/
protected GenMatrix ()
{
algebra = NumberAlgebra.getAlgebra(new StandardAlgebra());
}
/**
* Constructs a new GenMatrix with the given algebra.
*/
public GenMatrix (NumberAlgebra algebra)
{
this.algebra = NumberAlgebra.getAlgebra(algebra);
}
/**
*
*/
/**
*
*/
/**
* The binary sum operation on double entries.
*/
public final double sum (double x, double y)
{
return algebra.sum(x,y);
}
/**
* The binary product operation on double entries.
*/
public final double product (double x, double y)
{
return algebra.product(x,y);
}
/**
* The binary difference operation on double entries.
*/
public final double difference (double x, double y)
{
return algebra.difference(x,y);
}
/**
* The unary negating operation on a double entry.
*/
public final double negation (double x)
{
return algebra.negation(x);
}
/**
*
*/
/**
* This is the sum/product algebra used on the
* double entries for the generic matrix operations of a
* GenMatrix; the default algebra is a
* StandardAlgebra.
*/
static private NumberAlgebra algebra = NumberAlgebra.getAlgebra(new StandardAlgebra());
/**
* Return the sum/product algebra used on the
* double entries for the generic matrix operations of a
* GenMatrix.
*/
static public NumberAlgebra getNumberAlgebra ()
{
return algebra;
}
/**
* Set the sum/product algebra used on the
* double entries for the generic matrix operations of a
* GenMatrix to the given NumberAlgebra.
*/
static public final void setNumberAlgebra (NumberAlgebra alg)
{
algebra = NumberAlgebra.getAlgebra(alg);
}
}