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トポロジー火曜セミナー
過去の記録 ～06/07｜次回の予定｜今後の予定 06/08～
| 開催情報 | 火曜日 17:00～18:30 数理科学研究科棟(駒場) 056号室 |
|---|---|
| 担当者 | 河澄 響矢, 北山 貴裕, 逆井卓也, 葉廣和夫 |
| セミナーURL | https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index.html |
2010年05月18日(火)
16:30-18:00 数理科学研究科棟(駒場) 056号室
Tea: 16:00 - 16:30 コモンルーム
門田 直之 氏 (大阪大学大学院理学研究科)
On roots of Dehn twists (JAPANESE)
Tea: 16:00 - 16:30 コモンルーム
門田 直之 氏 (大阪大学大学院理学研究科)
On roots of Dehn twists (JAPANESE)
[ 講演概要 ]
Let tc be the Dehn twist about a nonseparating simple closed curve
c in a closed orientable surface. If a mapping class f satisfies
tc=fn in mapping class group, we call f a root of tc of
degree n. In 2009, Margalit and Schleimer constructed roots of tc.
In this talk, I will explain the data set which determine a root of
tc up to conjugacy. Moreover, I will explain the minimal and the
maximal degree.
Let tc be the Dehn twist about a nonseparating simple closed curve
c in a closed orientable surface. If a mapping class f satisfies
tc=fn in mapping class group, we call f a root of tc of
degree n. In 2009, Margalit and Schleimer constructed roots of tc.
In this talk, I will explain the data set which determine a root of
tc up to conjugacy. Moreover, I will explain the minimal and the
maximal degree.
