Local wild mapping class groups and cabled braids
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2022
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| _version_ | 1866913799515144192 |
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| author | Douçot, Jean Rembado, Gabriele Tamiozzo, Matteo |
| author_facet | Douçot, Jean Rembado, Gabriele Tamiozzo, Matteo |
| contents | We will define and study some generalisations of pure $\mathfrak{g}$-braid groups that occur in the theory of connections on curves, for any complex reductive Lie algebra $\mathfrak{g}$. They make up local pieces of the wild mapping class groups, which are fundamental groups of (universal) deformations of wild Riemann surfaces, underlying the braiding of Stokes data and generalising the usual mapping class groups. We will establish a general product decomposition for the local wild mapping class groups, and in many cases define a fission tree controlling this decomposition. Further in type A we will show one obtains cabled versions of braid groups, related to braid operads. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2204_08188 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Local wild mapping class groups and cabled braids Douçot, Jean Rembado, Gabriele Tamiozzo, Matteo Geometric Topology Algebraic Geometry Rings and Algebras Exactly Solvable and Integrable Systems 14D22, 14F35, 17B22, 32S22 We will define and study some generalisations of pure $\mathfrak{g}$-braid groups that occur in the theory of connections on curves, for any complex reductive Lie algebra $\mathfrak{g}$. They make up local pieces of the wild mapping class groups, which are fundamental groups of (universal) deformations of wild Riemann surfaces, underlying the braiding of Stokes data and generalising the usual mapping class groups. We will establish a general product decomposition for the local wild mapping class groups, and in many cases define a fission tree controlling this decomposition. Further in type A we will show one obtains cabled versions of braid groups, related to braid operads. |
| title | Local wild mapping class groups and cabled braids |
| topic | Geometric Topology Algebraic Geometry Rings and Algebras Exactly Solvable and Integrable Systems 14D22, 14F35, 17B22, 32S22 |
| url | https://arxiv.org/abs/2204.08188 |