Metrics for quandles
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909607722483712 |
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| author | Iwamoto, Kohei Kai, Ryoya Kodama, Yuya |
| author_facet | Iwamoto, Kohei Kai, Ryoya Kodama, Yuya |
| contents | A quandle is an algebraic system originating in knot theory, which can be regarded as a generalization of the conjugation of groups. This structure naturally defines two subgroups of its automorphism group, which are called the inner automorphism group and the displacement group, and they act on the quandle from the right. For a quandle with such groups being finitely generated, we investigate the graph structures induced from the actions, and induced metric spaces. The graph structures are defined by the notion of the Schreier graph, which is a natural generalization of the Cayley graph for a group. In particular, the metric associated with the displacement group for an important class of quandles, namely, generalized Alexander quandles, is studied in detail. We show that such a metric space is quasi-isometric to the displacement group with a word metric. Finally, we provide some examples quasi-isometric to typical metric spaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_07535 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Metrics for quandles Iwamoto, Kohei Kai, Ryoya Kodama, Yuya Geometric Topology Differential Geometry Group Theory Metric Geometry Primary 57K12, Secondary 20F65, 53C35 A quandle is an algebraic system originating in knot theory, which can be regarded as a generalization of the conjugation of groups. This structure naturally defines two subgroups of its automorphism group, which are called the inner automorphism group and the displacement group, and they act on the quandle from the right. For a quandle with such groups being finitely generated, we investigate the graph structures induced from the actions, and induced metric spaces. The graph structures are defined by the notion of the Schreier graph, which is a natural generalization of the Cayley graph for a group. In particular, the metric associated with the displacement group for an important class of quandles, namely, generalized Alexander quandles, is studied in detail. We show that such a metric space is quasi-isometric to the displacement group with a word metric. Finally, we provide some examples quasi-isometric to typical metric spaces. |
| title | Metrics for quandles |
| topic | Geometric Topology Differential Geometry Group Theory Metric Geometry Primary 57K12, Secondary 20F65, 53C35 |
| url | https://arxiv.org/abs/2505.07535 |