Biquandle (co)homology and handlebody-links
Abstract
In this paper, we introduce the (co)homology group of a multiple conjugation biquandle. It is the (co)homology group of the prismatic chain complex, which is related to the homology of foams introduced by J. S. Carter, modulo a certain subchain complex. We construct invariants for -oriented handlebody-links using -cocycles. When a multiple conjugation biquandle is obtained from a biquandle using -parallel operations, we provide a -cocycle (or -cocycle) of the multiple conjugation biquandle from a -cocycle (or -cocycle) of the biquandle equipped with an -set .
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