org.lsmp.djep.groupJep.groups
Class Rationals

java.lang.Object
  org.lsmp.djep.groupJep.groups.Group
      org.lsmp.djep.groupJep.groups.Rationals

All Implemented Interfaces:

GroupI, AbelianGroupI, FieldI, HasDivI, HasPowerI, IntegralDomainI, OrderedSetI, RingI

public class Rationals
extends Group
implements FieldI, OrderedSetI, HasPowerI

The Field of rational numbers.

Author:

Rich Morris Created on 05-Mar-2004

Constructor Summary

Rationals()

Method Summary

Number	add(Number a, Number b) Get sum of the numbers
int	compare(Number a, Number b) Returns -1,0,1 depending on whether a is less than, equal to or greater than b.
Number	div(Number a, Number b) get division of two numbers.
boolean	equals(Number a, Number b) whether two numbers are equal
Number	getInverse(Number num) Get Inverse of a number
Number	getMulInverse(Number num) get mul inverse
Number	getONE() Get multiplicative identity i.e.
Number	getZERO() Returns the identity element under +
Number	mul(Number a, Number b) Returns the product of two numbers, a*b
Number	pow(Number a, Number b)
Number	sub(Number a, Number b) Get the difference of the numbers.
String	toString()
Number	valueOf(String s) returns number given by the string

Methods inherited from class org.lsmp.djep.groupJep.groups.Group

addStandardConstants, addStandardFunctions, getNumberFactory, isConstantPoly

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.lsmp.djep.groupJep.GroupI

addStandardConstants, addStandardFunctions, getNumberFactory, isConstantPoly

Constructor Detail

Rationals

public Rationals()

Method Detail

getZERO

public Number getZERO()

Description copied from interface: GroupI

Returns the identity element under +

Specified by:

getZERO in interface GroupI

getONE

public Number getONE()

Description copied from interface: RingI

Get multiplicative identity i.e. 1. Strictly speaking a ring need not have a mul indentity. However most useful ones do, and they are not all integral domains.

Specified by:

getONE in interface RingI

getInverse

public Number getInverse(Number num)

Description copied from interface: GroupI

Get Inverse of a number

Specified by:

getInverse in interface GroupI

getMulInverse

public Number getMulInverse(Number num)

Description copied from interface: FieldI

get mul inverse

Specified by:

getMulInverse in interface FieldI

add

public Number add(Number a,
                  Number b)

Description copied from interface: GroupI

Get sum of the numbers

Specified by:

add in interface GroupI

sub

public Number sub(Number a,
                  Number b)

Description copied from interface: GroupI

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

Specified by:

sub in interface GroupI

mul

public Number mul(Number a,
                  Number b)

Description copied from interface: RingI

Returns the product of two numbers, a*b

Specified by:

mul in interface RingI

div

public Number div(Number a,
                  Number b)

Description copied from interface: HasDivI

get division of two numbers. i.e. a * ( b^-1). Strictly speeking

Specified by:

div in interface HasDivI

pow

public Number pow(Number a,
                  Number b)

Specified by:

pow in interface HasPowerI

equals

public boolean equals(Number a,
                      Number b)

Description copied from interface: GroupI

whether two numbers are equal

Specified by:

equals in interface GroupI

compare

public int compare(Number a,
                   Number b)

Description copied from interface: OrderedSetI

Returns -1,0,1 depending on whether a is less than, equal to or greater than b.

Specified by:

compare in interface OrderedSetI

valueOf

public Number valueOf(String s)

Description copied from interface: GroupI

returns number given by the string

Specified by:

valueOf in interface GroupI

toString

public String toString()

Overrides:

toString in class Group