GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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<Verb>AlexanderPolynomial(K):: PureCubicalComplex --> Polynomial</Verb>
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<Verb>AlexanderPolynomial(K):: PurePermComplex --> Polynomial</Verb>
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<Verb>AlexanderPolynomial(G):: FpGroup --> Polynomial</Verb><P/>
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<P/> Inputs a <M>3</M>-dimensional pure cubical or pure permutahdral complex <M>K</M> representing a knot and returns the Alexander polynomial of the fundamental group 
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<M>G = \pi_1(\mathbb R^3\setminus K)</M>.
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<P/> Inputs a finitely presented group <M>G</M> with infinite cyclic abelianization and returns its Alexander polynomial.
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