A classification of triangular Riemann surfaces with $2p^2$ automorphisms

Fuente: arXiv
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Main Authors: Reyes-Carocca, Sebastián, Nene, Yazmin Rivera
Format: Preprint
Published: 2026
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author Reyes-Carocca, Sebastián
Nene, Yazmin Rivera
author_facet Reyes-Carocca, Sebastián
Nene, Yazmin Rivera
contents In this article we provide a classification and description of compact Riemann surfaces admitting a triangular action of a group of order $2p^2,$ where $p$ is an odd prime number. We obtain that all such Riemann surfaces are isomorphic to curves defined over the rational numbers. As a by-product, we derive a classification of orientably-regular hypermaps whose orientation-preserving automorphism group has order $2p^2.$
format Preprint
id arxiv_https___arxiv_org_abs_2605_27266
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle A classification of triangular Riemann surfaces with $2p^2$ automorphisms
Reyes-Carocca, Sebastián
Nene, Yazmin Rivera
Algebraic Geometry
14H30, 30F10, 14H37, 30F35, 14H57
In this article we provide a classification and description of compact Riemann surfaces admitting a triangular action of a group of order $2p^2,$ where $p$ is an odd prime number. We obtain that all such Riemann surfaces are isomorphic to curves defined over the rational numbers. As a by-product, we derive a classification of orientably-regular hypermaps whose orientation-preserving automorphism group has order $2p^2.$
title A classification of triangular Riemann surfaces with $2p^2$ automorphisms
topic Algebraic Geometry
14H30, 30F10, 14H37, 30F35, 14H57
url https://arxiv.org/abs/2605.27266