edu.jas.application
Class ResidueRing<C extends RingElem<C>>

java.lang.Object
  edu.jas.application.ResidueRing<C>

All Implemented Interfaces:

AbelianGroupFactory<Residue<C>>, ElemFactory<Residue<C>>, MonoidFactory<Residue<C>>, RingFactory<Residue<C>>, java.io.Serializable

public class ResidueRing<C extends RingElem<C>>
extends java.lang.Object
implements RingFactory<Residue<C>>

Residue ring factory based on GenPolynomial with RingFactory interface. Objects of this class are immutable.

Author:

Heinz Kredel

See Also:

Serialized Form

Field Summary

protected Ideal<C>	ideal Polynomial ideal for the reduction.
protected int	isField Indicator if this ring is a field.
protected GenPolynomialRing<C>	ring Polynomial ring of the factory.

Constructor Summary

ResidueRing(Ideal<C> i)
The constructor creates a ResidueRing object from an Ideal.

Method Summary

java.math.BigInteger	characteristic() Characteristic of this ring.
Residue<C>	copy(Residue<C> c) Copy Residue element c.
boolean	equals(java.lang.Object b) Comparison with any other object.
Residue<C>	fromInteger(java.math.BigInteger a) Get a Residue element from a BigInteger value.
Residue<C>	fromInteger(long a) Get a Residue element from a long value.
Residue<C>	getONE() Get the one element.
Residue<C>	getZERO() Get the zero element.
int	hashCode() Hash code for this residue ring.
boolean	isAssociative() Query if this ring is associative.
boolean	isCommutative() Query if this ring is commutative.
boolean	isField() Query if this ring is a field.
Residue<C>	parse(java.io.Reader r) Parse Residue from Reader.
Residue<C>	parse(java.lang.String s) Parse Residue from String.
Residue<C>	random(int n) Residue random.
Residue<C>	random(int k, int l, int d, float q) Generate a random residum polynomial.
Residue<C>	random(int n, java.util.Random rnd) Residue random.
java.lang.String	toString() Get the String representation as RingFactory.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ideal

protected final Ideal<C extends RingElem<C>> ideal

Polynomial ideal for the reduction.

ring

protected final GenPolynomialRing<C extends RingElem<C>> ring

Polynomial ring of the factory. Shortcut to ideal.list.ring.

isField

protected int isField

Indicator if this ring is a field.

Constructor Detail

ResidueRing

public ResidueRing(Ideal<C> i)

The constructor creates a ResidueRing object from an Ideal.

Parameters:

i - polynomial ideal.

Method Detail

copy

public Residue<C> copy(Residue<C> c)

Copy Residue element c.

Specified by:

copy in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

c -

Returns:

a copy of c.

getZERO

public Residue<C> getZERO()

Get the zero element.

Specified by:

getZERO in interface AbelianGroupFactory<Residue<C extends RingElem<C>>>

Returns:

0 as Residue.

getONE

public Residue<C> getONE()

Get the one element.

Specified by:

getONE in interface MonoidFactory<Residue<C extends RingElem<C>>>

Returns:

1 as Residue.

isCommutative

public boolean isCommutative()

Query if this ring is commutative.

Specified by:

isCommutative in interface MonoidFactory<Residue<C extends RingElem<C>>>

Returns:

true if this ring is commutative, else false.

isAssociative

public boolean isAssociative()

Query if this ring is associative.

Specified by:

isAssociative in interface MonoidFactory<Residue<C extends RingElem<C>>>

Returns:

true if this ring is associative, else false.

isField

public boolean isField()

Query if this ring is a field.

Specified by:

isField in interface RingFactory<Residue<C extends RingElem<C>>>

Returns:

false.

characteristic

public java.math.BigInteger characteristic()

Characteristic of this ring.

Specified by:

characteristic in interface RingFactory<Residue<C extends RingElem<C>>>

Returns:

characteristic of this ring.

fromInteger

public Residue<C> fromInteger(java.math.BigInteger a)

Get a Residue element from a BigInteger value.

Specified by:

fromInteger in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

a - BigInteger.

Returns:

a Residue.

fromInteger

public Residue<C> fromInteger(long a)

Get a Residue element from a long value.

Specified by:

fromInteger in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

a - long.

Returns:

a Residue.

toString

public java.lang.String toString()

Get the String representation as RingFactory.

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()

equals

public boolean equals(java.lang.Object b)

Comparison with any other object.

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Hash code for this residue ring.

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

random

public Residue<C> random(int n)

Residue random.

Specified by:

random in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

n - such that 0 ≤ v ≤ (2ⁿ-1).

Returns:

a random residue element.

random

public Residue<C> random(int k,
                         int l,
                         int d,
                         float q)

Generate a random residum polynomial.

Parameters:

k - bitsize of random coefficients.

l - number of terms.

d - maximal degree in each variable.

q - density of nozero exponents.

Returns:

a random residue polynomial.

random

public Residue<C> random(int n,
                         java.util.Random rnd)

Residue random.

Specified by:

random in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

n - such that 0 ≤ v ≤ (2ⁿ-1).

rnd - is a source for random bits.

Returns:

a random residue element.

parse

public Residue<C> parse(java.lang.String s)

Parse Residue from String.

Specified by:

parse in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

s - String.

Returns:

Residue from s.

parse

public Residue<C> parse(java.io.Reader r)

Parse Residue from Reader.

Specified by:

parse in interface ElemFactory<Residue<C extends RingElem<C>>>

Parameters:

r - Reader.

Returns:

next Residue from r.