gap> arc:=[[2,4],[1,3],[2,4],[1,3]];;
gap> f:=ArcPresentationToKnottedOneComplex(arc);
Map of regular CW-complexes
gap> comp:=RegularCWComplexComplement(f);
Testing contractibility...
151 out of 151 cells tested.
The input is compatible with this algorithm.
Regular CW-complex of dimension 3
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(vorverarbeitet am 2026-04-28)
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