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Special issue: 2014 KOOK-TAPU Workshop on Knot Theory and Related TopicsNo Access

Computations of quandle cocycle invariants of surface-links using marked graph diagrams

    https://doi.org/10.1142/S0218216515400106Cited by:4 (Source: Crossref)

    By using the cohomology theory of quandles, quandle cocycle invariants and shadow quandle cocycle invariants are defined for oriented links and surface-links via broken surface diagrams. By using symmetric quandles, symmetric quandle cocycle invariants are also defined for unoriented links and surface-links via broken surface diagrams. A marked graph diagram is a link diagram possibly with 4-valent vertices equipped with markers. Lomonaco, Jr. and Yoshikawa introduced a method of describing surface-links by using marked graph diagrams. In this paper, we give interpretations of these quandle cocycle invariants in terms of marked graph diagrams, and introduce a method of computing them from marked graph diagrams.

    AMSC: 57M25, 57M27