Symmetries of spatial graphs and Simon invariants

Ryo Nikkuni, Kouki Taniyama

    Research output: Contribution to journalArticle

    9 Citations (Scopus)


    An ordered and oriented 2-component link L in the 3-sphere is said to be achiral if it is ambient isotopic to its mirror image ignoring the orientation and ordering of the components. Kirk-Livingston showed that if L is achiral then the linking number of L is not congruent to 2 modulo 4. In this paper we study orientation-preserving or reversing symmetries of 2-component links, spatial complete graphs on 5 vertices and spatial complete bipartite graphs on 3 + 3 vertices in detail, and determine necessary conditions on linking numbers and Simon invariants for such links and spatial graphs to be symmetric

    Original languageEnglish
    Pages (from-to)219-236
    Number of pages18
    JournalFundamenta Mathematicae
    Issue number3
    Publication statusPublished - 2009



    • Achiral link
    • Linking number
    • Simon invariant
    • Symmetric spatial graph

    ASJC Scopus subject areas

    • Algebra and Number Theory

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