############################################################################# ## ## This file is part of GAP, a system for computational discrete algebra. ## This file's authors include Alexander Hulpke. ## ## Copyright of GAP belongs to its developers, whose names are too numerous ## to list here. Please refer to the COPYRIGHT file for details. ## ## SPDX-License-Identifier: GPL-2.0-or-later ## ## This file contains attributes, properties and operations for univariate ## polynomials over the rationals ##
############################################################################# ## #F BPolyProd(<a>,<b>,<m>,<p>) . . . . . . polynomial product a*b mod m mod p ## ## <ManSection> ## <Func Name="BPolyProd" Arg='a,b,m,p'/> ## ## <Description> ## return EuclideanRemainder(PolynomialRing(Rationals),a</E>b mod p,m) mod p; ## </Description> ## </ManSection> ##
DeclareGlobalFunction("BPolyProd");
############################################################################# ## #F PrimitivePolynomial( <f> ) ## ## <#GAPDoc Label="PrimitivePolynomial"> ## <ManSection> ## <Oper Name="PrimitivePolynomial" Arg='f'/> ## ## <Description> ## takes a polynomial <A>f</A> with rational coefficients and computes a new ## polynomial with integral coefficients, obtained by multiplying with the ## Lcm of the denominators of the coefficients and casting out the content ## (the Gcd of the coefficients). The operation returns a list ## [<A>newpol</A>,<A>coeff</A>] with rational <A>coeff</A> such that ## <C><A>coeff</A>*<A>newpol</A>=<A>f</A></C>. ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareGlobalFun(#
############################################################################# ## #F BombieriNorm(<pol>) ## ## <#GAPDoc Label="BombieriNorm"> ## <ManSection> ## <Func Name="BombieriNorm" Arg='pol'/> ## ## <Description> ## computes weighted Norm [<A>pol</A>]<M>_2</M> of <A>pol</A> which is a ## good measure for factor coefficients (see <Cite Key="BTW93"/>). ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareGlobalFunction("## <A>p</A>.
## ## #A MinimizedBombieriNorm( <f> ) . . . Tschirnhaus transf'd polynomial ## ## <#GAPDoc Label="MinimizedBombieriNorm"> ## <ManSection> ## <Attr Name="MinimizedBombieriNorm" Arg='f'/> ## ## <Description> ## This function applies linear Tschirnhaus transformations ## (<M>x \mapsto x + i</M>) to the ## polynomial <A>f</A>, trying to get the Bombieri norm of <A>f</A> small. It returns a ## list <C>[<A>new_polynomial</A>, <A>i_of_transformation</A>]</C>. ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareAttribute("MinimizedBombieriNorm",
IsPolynomial and IsRationalFunctionsFamilyElement);
############################################################################# ## #F RootBound(<f>) ## ## <ManSection> ## <Func Name="RootBound" Arg='f'/> ## ## <Description> ## returns the bound for the norm of (complex) roots of the rational ## univariate polynomial <A>f</A>. ## </Description> ## </ManSection> ##
DeclareGlobalFunction("RootBound");
############################################################################# ## #F OneFactorBound(<pol>) ## ## <#GAPDoc Label="OneFactorBound"> ## <ManSection> ## <Func Name="OneFactorBound" Arg='pol'/> ## ## <Description> ## returns the coefficient bound for a single factor of the rational ## polynomial <A>pol</A>. ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareGlobalFunction("OneFactorBound");
############################################################################# ## #F HenselBound(<pol>,[<minpol>,<den>]) . . . Bounds for Factor coefficients ## ## <#GAPDoc Label="HenselBound"> ## <ManSection> ## <Func Name="HenselBound" Arg='pol,[minpol,den]'/> ## ## <Description> ## returns the Hensel bound of the polynomial <A>pol</A>. ## If the computation takes place over an algebraic extension, then ## the minimal polynomial <A>minpol</A> and denominator <A>den</A> must be given. ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareGlobalFunction("HenselBound");
############################################################################# ## #F TrialQuotientRPF(<f>,<g>,<b>) ## ## <ManSection> ## <Func Name="TrialQuotientRPF" Arg='f,g,b'/> ## ## <Description> ## returns <M><A>f</A>/<A>g</A></M> if coefficient bounds are given by list <A>b</A>. ## </Description> ## </ManSection> ##
DeclareGlobalFunction("TrialQuotientRPF");
DeclareGlobalFunction("HeuGcdIntPolsExtRep"); # to permit recursive call
DeclareGlobalFunction("HeuGcdIntPolsCoeffs"); # univariate version
############################################################################# ## #F PolynomialModP(<pol>,<p>) ## ## <#GAPDoc Label="PolynomialModP"> ## <ManSection> ## <Func Name="PolynomialModP" Arg='pol,p'/> ## ## <Description> ## for a rational polynomial <A>pol</A> this function returns a polynomial over ## the field with <A>p</A> elements, obtained by reducing the coefficients modulo ## <A>p</A>. ## </Description> ## </ManSection> ## <#/GAPDoc> ##
DeclareGlobalFunction("PolynomialModP");
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