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

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<Verb>Display(G) :: Graph --> void</Verb>
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<Verb>Display(M) :: PureCubicalComplex --> void</Verb>
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<Verb>Display(M) :: PurePermutahedralComplex --> void</Verb><P/>
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<P/>Displays a graph <M>G</M>; a $2$- or $3$-dimensional 
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pure cubical complex <M>M</M>;  a $3$-dimensional pure permutahedral complex
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<M>M</M>.  
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