org.lsmp.djep.groupJep.values

Class Polynomial

java.lang.Object

java.lang.Number

org.lsmp.djep.groupJep.values.Polynomial

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FreeGroupElement

public class Polynomial
extends Number

The ring of polynomials over a ring R.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Polynomial(RingI baseRing, String symbol, Number[] coeffs) Construct a polynomial over a ring.

Method Summary

Modifier and Type	Method and Description
Polynomial	add(Polynomial poly)
Complex	calculateComplexValue(Complex rootVal) returns the complex value of this polynomial.
Number	calculateValue(Number rootVal)
Polynomial	div(Polynomial poly)
double	doubleValue() value of constant coeff.
boolean	equals(Polynomial n)
float	floatValue() value of constant coeff.
RingI	getBaseRing()
Number	getCoeff(int i)
Number[]	getCoeffs() Returns the coefficients of polynomial.
int	getDegree()
String	getSymbol()
int	intValue() value of constant coeff.
boolean	isConstantPoly() Is this a constant polynomial?
long	longValue() value of constant coeff.
Polynomial	mul(Polynomial poly)
Polynomial	pow(int exp)
Polynomial	sub(Polynomial poly)
String	toString()

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Polynomial

public Polynomial(RingI baseRing,
                  String symbol,
                  Number[] coeffs)

Construct a polynomial over a ring. In general the valueOf method should be used to construct a new polynomial.

Parameters:

baseRing - the underlying ring of the polynomial.

symbol - the symbol used to display the polynomial

coeffs - an array of coeficients in the base ring coeff[0] is constant, coeff[1] is coefficient of t etc.

Method Detail

add

public Polynomial add(Polynomial poly)

sub

public Polynomial sub(Polynomial poly)

mul

public Polynomial mul(Polynomial poly)

div

public Polynomial div(Polynomial poly)

pow

public Polynomial pow(int exp)

toString

public String toString()

Overrides:

toString in class Object

getDegree

public int getDegree()

getSymbol

public String getSymbol()

getCoeffs

public Number[] getCoeffs()

Returns the coefficients of polynomial. TODO use defensive copying

Returns:

the array of coefficients, constant coefficient is element 0.

getCoeff

public Number getCoeff(int i)

getBaseRing

public RingI getBaseRing()

intValue

public int intValue()

value of constant coeff.

Specified by:

intValue in class Number

longValue

public long longValue()

value of constant coeff.

Specified by:

longValue in class Number

floatValue

public float floatValue()

value of constant coeff.

Specified by:

floatValue in class Number

doubleValue

public double doubleValue()

value of constant coeff.

Specified by:

doubleValue in class Number

isConstantPoly

public boolean isConstantPoly()

Is this a constant polynomial?

equals

public boolean equals(Polynomial n)

calculateComplexValue

public Complex calculateComplexValue(Complex rootVal)

returns the complex value of this polynomial. Where the value of the symbol is replaced by rootVal.

calculateValue

public Number calculateValue(Number rootVal)