<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-2022-jp"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div><div><font size="4"> 皆様・髟阡�</font></div><div><font size="4"><br></font></div><div><font size="4">開催日が近づいてきましたので・髟阡産禿戮完篤眞廚靴泙后�</font></div><div><font size="4"><br></font></div><div><font size="4"> 第２回九州合同セミナ・踉�</font></div><div><div style="margin: 0px; "><div><font size="4">日時: 2013年11月9日（土) 16:00 - 17:00 （ティ・踉札織ぅ�: 15:30 - 16:00）</font></div><div><font size="4">��貊�: ���冝臑膤慷�愽�220����（理学部１号館と２号館２階の渡り廊王踉擦砲���る階段教����）</font></div><div><font size="4">講師: Scott A. Wolpert 氏 (University of Maryland, College Park)</font></div><div><font size="4">題目: PSL<span class="GINGER_SOFATWARE_correct" grcontextid="(:0" ginger_sofatware_markguid="798dc5c4-603e-4eee-aef2-6174f126b8e7" ginger_sofatware_uiphraseguid="0ce8744e-4b2d-47e5-9283-ce6185e1dcbd">(</span>n<span class="GINGER_SOFATWARE_correct" grcontextid=";:1" ginger_sofatware_markguid="ebd54f3b-21e8-427c-9462-382fd5a63b0d" ginger_sofatware_uiphraseguid="0ce8744e-4b2d-47e5-9283-ce6185e1dcbd">;</span>R) surface group representations and projective twist-bulge deformations</font></div><div><font size="4">要旨: </font></div><div><font size="4">We consider projective PSL(n;R) representations of the fundamental group of a surface with finite topology. The goal is to use generalizations of the Fenchel-Nielsen twist deformation to understand the geometry of the representation space. For PSL(n;R) representations of compact surfaces, we review basic results for the Hitchin component, including results of Benzecri, Goldman, Labourie and Bonahon-Dreyer. We discuss the Labourie & Fock-Goncharov positivity condition for the “flag curve”. The twist-bulge deformation for PSL(3;R) representations is described and we present the formula of our student Terence Long for the twist-bulge derivative of a generalized cross ratio. </font></div><div><font size="4"><br></font></div><div><font size="4">ポスタ・踉察�<a href="http://www2.math.kyushu-u.ac.jp/~weng/WolpertKJS.pdf">http://www2.math.kyushu-u.ac.jp/~weng/WolpertKJS.pdf</a></font></div><div><font size="4"><br></font></div><div><font size="4">当日12:00以降・髟阡四�愽遙厩羇曚硲温羇曚慮��関がともに解��獷気譴泙后�</font></div><div><font size="4">交通ウ髟阡札�札后Е踉晒児島大学郡元キャンパス（JR���冝臙羆璉悗茲蟷堙天憾宜圓�7分・髟阡仕睫�覆箸宗謀田箍����屮好亜�</font></div><div><font size="4"><a href="http://www.kagoshima-u.ac.jp/access/">http://www.kagoshima-u.ac.jp/access/</a></font></div><div><font size="4"><br></font></div><div><font size="4">なお・髟阡擦海離札潺福��は���冝臑膤愎��苳諮報科学談話会と共瘢雹催です。</font></div><div><font size="4"><br></font></div><div><font size="4">組織委員：</font></div><div><font size="4">市川��飴屐丙寛貘膤悄法�<a href="mailto:ichikawa@ms.saga-u.ac.jp">ichikawa@ms.saga-u.ac.jp</a></font></div><div><font size="4">翁林（九州大学）：<a href="mailto:weng@math.kyushu-u.ac.jp">weng@math.kyushu-u.ac.jp</a></font></div><div><font size="4">加藤文元（熊本大学）：<a href="mailto:kato@sci.kumamoto-u.ac.jp">kato@sci.kumamoto-u.ac.jp</a></font></div><div><font size="4">���に�廖弗踉晒児島大学）：<a href="mailto:obitsu@sci.kagoshima-u.ac.jp">obitsu@sci.kagoshima-u.ac.jp</a></font></div><div><font size="4"><br></font></div><div><div><font size="4"> ����</font></div><div><div><font size="4">���冝臑膤愨膤惘� 理工学研瘢雹究科 数理��霾鷁奮慇豺�</font></div><div><font size="4">����890-0065 ���冝膸垠憾�1-21-35<br>TEL: 099-285-8031<br>E-MAIL: <a href="mailto:obitsu@sci.kagoshima-u.ac.jp">obitsu@sci.kagoshima-u.ac.jp</a></font></div></div></div><div><br></div></div></div></div></body></html>