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複素解析幾何セミナー
過去の記録 ～06/11｜次回の予定｜今後の予定 06/12～
| 開催情報 | 月曜日 10:30～12:00 数理科学研究科棟(駒場) 126号室 |
|---|---|
| 担当者 | 平地 健吾, 高山 茂晴 |
2026年06月01日(月)
10:30-12:00 数理科学研究科棟(駒場) 126号室
小森 洋平 氏 (早稲田大学)
Classification of arithmetic twice-punctured torus groups (Japanese)
https://forms.gle/8ERsVDLuKHwbVzm57
小森 洋平 氏 (早稲田大学)
Classification of arithmetic twice-punctured torus groups (Japanese)
[ 講演概要 ]
A Fuchsian group is called arithmetic if it is commensurable with a Fuchsian group derived from a quaternion algebra. In this talk we will determine arithmetic twice-punctured torus groups; arithmetic once-punctured torus groups were already classified by Kisao Takeuchi. Our strategy is based on Takeuchi's approach to classify quadrilateral subgroups of the modular group. (“Subgroups of the modular group with signature (0 ; e1, e2, e3, e4)”（Saitama Math. Jour. Vol.14, 55—78, 1996).)
[ 参考URL ]A Fuchsian group is called arithmetic if it is commensurable with a Fuchsian group derived from a quaternion algebra. In this talk we will determine arithmetic twice-punctured torus groups; arithmetic once-punctured torus groups were already classified by Kisao Takeuchi. Our strategy is based on Takeuchi's approach to classify quadrilateral subgroups of the modular group. (“Subgroups of the modular group with signature (0 ; e1, e2, e3, e4)”（Saitama Math. Jour. Vol.14, 55—78, 1996).)
https://forms.gle/8ERsVDLuKHwbVzm57
