org.lsmp.djep.groupJep
Interface GroupI

All Known Subinterfaces:

AbelianGroupI, FieldI, IntegralDomainI, RingI

All Known Implementing Classes:

AlgebraicExtension, BigReals, FreeGroup, Group, Integers, PermutationGroup, Quartonians, Rationals, Reals, Zn

public interface GroupI

Represents a group with an identity, and addition operator.

Author:

Rich Morris Created on 05-Mar-2004

Method Summary

java.lang.Number	add(java.lang.Number a, java.lang.Number b) Get sum of the numbers
void	addStandardConstants(JEP j) adds the standard constants for this group
void	addStandardFunctions(JEP j) adds the standard function for this group
boolean	equals(java.lang.Number a, java.lang.Number b) whether two numbers are equal
java.lang.Number	getInverse(java.lang.Number num) Get Inverse of a number
NumberFactory	getNumberFactory() returns a number factory for creating group elements from strings.
java.lang.Number	getZERO() Returns the identity element under +
java.lang.Number	sub(java.lang.Number a, java.lang.Number b) Get the difference of the numbers.
java.lang.Number	valueOf(java.lang.String s) returns number given by the string

Method Detail

getZERO

public java.lang.Number getZERO()

Returns the identity element under +

getInverse

public java.lang.Number getInverse(java.lang.Number num)

Get Inverse of a number

add

public java.lang.Number add(java.lang.Number a,
                            java.lang.Number b)

Get sum of the numbers

sub

public java.lang.Number sub(java.lang.Number a,
                            java.lang.Number b)

Get the difference of the numbers. i.e. a + (-b)

equals

public boolean equals(java.lang.Number a,
                      java.lang.Number b)

whether two numbers are equal

valueOf

public java.lang.Number valueOf(java.lang.String s)

returns number given by the string

getNumberFactory

public NumberFactory getNumberFactory()

returns a number factory for creating group elements from strings. Most groups which are subclasses of Group do not need to implement this method.

addStandardConstants

public void addStandardConstants(JEP j)

adds the standard constants for this group

addStandardFunctions

public void addStandardFunctions(JEP j)

adds the standard function for this group