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Character variety of the five-punctured sphere and the determinantal quintic hypersurface
Abstract
Using skein-theoretic methods, we study the SL2(C) character variety of the five-punctured sphere with arbitrary conjugacy class at each of the five punctures. We show that a Fricke-Klein-Vogt-type relation is realized as a symmetric determinantal hypersurface. We also give a realization of the character variety in terms of cluster variables. We explicitly derive the Poisson structure of the simple closed curves on the surface, and prove that cluster mutations induce automorphisms of the character variety.
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BibTeX
@misc{hikami2026character,
title = {{Character variety of the five-punctured sphere and the determinantal quintic hypersurface}},
author = {Kazuhiro Hikami},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12092},
eprint = {2610.12092},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12092},
}
RIS
TY - UNPB
TI - Character variety of the five-punctured sphere and the determinantal quintic hypersurface
AU - Kazuhiro Hikami
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.12092
UR - https://arxiv.org/abs/2610.12092
AB - Using skein-theoretic methods, we study the SL2(C) character variety of the five-punctured sphere with arbitrary conjugacy class at each of the five punctures. We show that a Fricke-Klein-Vogt-type relation is realized as a symmetric determinantal hypersurface. We also give a realization of the character variety in terms of cluster variables. We explicitly derive the Poisson structure of the simple closed curves on the surface, and prove that cluster mutations induce automorphisms of the character variety.
ER -