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

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<Section><Heading>Chain Complex</Heading>
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Given a polyhedron, the face lattice defines a chain complex. This
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can be done using the following function.
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<ManSection>
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<Meth Name="ChainComplexFromPolygon"
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Arg="poly"/>
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<Returns> A <Ref Fam="HapChainComplex" BookName="hap"></Ref></Returns>
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<Description>
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Given a polyhedron <A>poly</A> as generated by <Package>polymaking</Package>
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(see <Ref Meth="CreatePolymakeObjectFromFile"
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BookName="polymaking"></Ref>), this method generates the face
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complex.
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</Description>
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</ManSection>
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</Section>
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