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--- status: draft
--- author(s): Popescu
--- notes:
document {
Key => HH,
Headline => "general homology and cohomology functor",
TT "HH", " is a ", TO "ScriptedFunctor", " which serves as an interface
to the methods for ", TO "homology", " and ", TO "cohomology", ", in
the sense that, ", TT "HH_i(M)", " is an abbreviation for ", TT "homology(i,M)", "
", TT "HH^i(M)", " is an abbreviation for ", TT "cohomology(i,M)", ",
and ", TT "HH(M)", " is an abbreviation for ", TT "homology(,M)", ".
A second argument and optional arguments may be added."
}
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