GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
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#W factors.gd Alnuth - ALgebraic NUmber THeory Andreas Distler
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#F FactorsPolynomialPari, function( <poly> )
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## Factorizes the polynomial <poly> defined over an algebraic extension of
## the rationals using PARI/GP
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## As a method of 'Factors' ? AD
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DeclareGlobalFunction("FactorsPolynomialPari");
## ensure backwards compatibility with formerly documented functionality
DeclareSynonym("FactorsPolynomialKant", FactorsPolynomialPari);
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#F FactorsPolynomialAlgExt, function( <H>, <poly> )
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## Factorizes the rational polynomial <poly> over the field <H>, a proper
## algebraic extension of the rationals, using PARI/GP
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DeclareGlobalFunction( "FactorsPolynomialAlgExt" );
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#M IrrFacsAlgExtPol(<f>) . . . . . lists of irreducible factors of rational
## polynomial over algebraic extensions, initialize default
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DeclareAttribute( "IrrFacsAlgExtPol", IsUnivariatePolynomial, "mutable" );
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#F StoreFactorsAlgExtPol( <pring>, <upol>, <factlist> ) . store factors list
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DeclareGlobalFunction( "StoreFactorsAlgExtPol" );
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#E