Package edu.jas.ps
Class MultiVarCoefficients<C extends RingElem<C>>
- java.lang.Object
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- edu.jas.ps.MultiVarCoefficients<C>
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- Type Parameters:
C
- ring element type
- All Implemented Interfaces:
java.io.Serializable
public abstract class MultiVarCoefficients<C extends RingElem<C>> extends java.lang.Object implements java.io.Serializable
Abstract class for generating functions for coefficients of multivariate power series. This class handles the caching itself.- Author:
- Heinz Kredel
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description java.util.HashMap<java.lang.Long,GenPolynomial<C>>
coeffCache
Cache for already computed coefficients.java.util.BitSet
homCheck
Indicator if all coefficients of a homogeneous degree have been constructed.GenPolynomialRing<C>
pfac
Ring factory for polynomials.java.util.HashSet<ExpVector>
zeroCache
Cache for known zero coefficients.
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Constructor Summary
Constructors Constructor Description MultiVarCoefficients(GenPolynomialRing<C> pf)
Public constructor.MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache)
Public with pre-filled coefficient cache.MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.BitSet hc)
Public constructor with pre-filled caches.MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.HashSet<ExpVector> zeros)
Public constructor with pre-filled caches.MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.HashSet<ExpVector> zeros, java.util.BitSet hc)
Public constructor with pre-filled caches.MultiVarCoefficients(MultiVarPowerSeriesRing<C> pf)
Public constructor.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected abstract C
generate(ExpVector index)
Generate coefficient.C
get(ExpVector index)
Get cached coefficient or generate coefficient.GenPolynomial<C>
getHomPart(long tdeg)
Homogeneous part.
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Field Detail
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pfac
public final GenPolynomialRing<C extends RingElem<C>> pfac
Ring factory for polynomials.
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coeffCache
public final java.util.HashMap<java.lang.Long,GenPolynomial<C extends RingElem<C>>> coeffCache
Cache for already computed coefficients.
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homCheck
public final java.util.BitSet homCheck
Indicator if all coefficients of a homogeneous degree have been constructed.
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Constructor Detail
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MultiVarCoefficients
public MultiVarCoefficients(MultiVarPowerSeriesRing<C> pf)
Public constructor.- Parameters:
pf
- multivariate power series ring factory.
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MultiVarCoefficients
public MultiVarCoefficients(GenPolynomialRing<C> pf)
Public constructor.- Parameters:
pf
- polynomial ring factory.
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MultiVarCoefficients
public MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache)
Public with pre-filled coefficient cache.- Parameters:
pf
- polynomial ring factory.cache
- pre-filled coefficient cache.
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MultiVarCoefficients
public MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.HashSet<ExpVector> zeros)
Public constructor with pre-filled caches.- Parameters:
pf
- polynomial ring factory.cache
- pre-filled coefficient cache.zeros
- pre-filled zero coefficient cache.
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MultiVarCoefficients
public MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.BitSet hc)
Public constructor with pre-filled caches.- Parameters:
pf
- polynomial ring factory.cache
- pre-filled coefficient cache.hc
- pre-filled homogeneous check bit-set.
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MultiVarCoefficients
public MultiVarCoefficients(GenPolynomialRing<C> pf, java.util.HashMap<java.lang.Long,GenPolynomial<C>> cache, java.util.HashSet<ExpVector> zeros, java.util.BitSet hc)
Public constructor with pre-filled caches.- Parameters:
pf
- polynomial ring factory.cache
- pre-filled coefficient cache.zeros
- pre-filled zero coefficient cache.hc
- pre-filled homogeneous check bit-set.
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Method Detail
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get
public C get(ExpVector index)
Get cached coefficient or generate coefficient.- Parameters:
index
- of requested coefficient.- Returns:
- coefficient at index.
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getHomPart
public GenPolynomial<C> getHomPart(long tdeg)
Homogeneous part.- Parameters:
tdeg
- requested degree.- Returns:
- polynomial part of given degree.
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