<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">$B!!3'MM!"(B</font></div><div><font size="4"><br></font></div><div><font size="4">$B3+:EF|$,6a$E$$$F$-$^$7$?$N$G!":FEY$40FFbCW$7$^$9!#(B</font></div><div><font size="4"><br></font></div><div><font size="4">$B!!Bh#22s6e=#9gF1%;%_%J!<(B</font></div><div><div style="margin: 0px; "><div><font size="4">$BF|;~(B: 2013$BG/(B11$B7n(B9$BF|!JEZ(B) 16:00 - 17:00 $B!J%F%#!<%?%$%`(B: 15:30 - 16:00$B!K(B</font></div><div><font size="4">$B>l=j(B: $B</;yEgBg3XM}3XIt(B220$B<<!JM}3XIt#19f4[$H#29f4[#23,$NEO$jO-2<$K$"$k3,CJ65<<!K(B</font></div><div><font size="4">$B9V;U(B: Scott A. Wolpert $B;a(B (University of Maryland, College Park)</font></div><div><font size="4">$BBjL\(B: 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">$BMW;](B: </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 $B!H(Bflag curve$B!I(B. 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">$B%]%9%?!<!'(B<a href="http://www2.math.kyushu-u.ac.jp/~weng/WolpertKJS.pdf">http://www2.math.kyushu-u.ac.jp/~weng/WolpertKJS.pdf</a></font></div><div><font size="4"><br></font></div><div><font size="4">$BEvF|(B12:00$B0J9_!"M}3XIt#19f4[$H#29f4[$N8<4X$,$H$b$K2r>{$5$l$^$9!#(B</font></div><div><font size="4">$B8rDL%"%/%;%9!'</;yEgBg3X7485%-%c%s%Q%9!J(BJR$B</;yEgCf1{1X$h$j;TEE74859T$-(B7$BJ,!"EbL+!J$H$=!KEEDd2<<V%9%0!K(B</font></div><div><font size="4"><a href="http://www.kagoshima-u.ac.jp/access/">http://www.kagoshima-u.ac.jp/access/</a></font></div><div><font size="4"><br></font></div><div><font size="4">$B$J$*!"$3$N%;%_%J!<$O</;yEgBg3X?tM}>pJs2J3XCLOC2q$H6&:E$G$9!#(B</font></div><div><font size="4"><br></font></div><div><font size="4">$BAH?%0Q0w!'(B</font></div><div><font size="4">$B;T@n>0;V!J:42lBg3X!K!'(B<a href="mailto:ichikawa@ms.saga-u.ac.jp">ichikawa@ms.saga-u.ac.jp</a></font></div><div><font size="4">$B2'NS!J6e=#Bg3X!K!'(B<a href="mailto:weng@math.kyushu-u.ac.jp">weng@math.kyushu-u.ac.jp</a></font></div><div><font size="4">$B2CF#J885!J7'K\Bg3X!K!'(B<a href="mailto:kato@sci.kumamoto-u.ac.jp">kato@sci.kumamoto-u.ac.jp</a></font></div><div><font size="4">$B>.]$K.IW!J</;yEgBg3X!K!'(B<a href="mailto:obitsu@sci.kagoshima-u.ac.jp">obitsu@sci.kagoshima-u.ac.jp</a></font></div><div><font size="4"><br></font></div><div><div><font size="4">$B!!>.]$(B</font></div><div><div><font size="4">$B</;yEgBg3XBg3X1!(B $BM}9)3X8&5f2J(B $B?tM}>pJs2J3X@l96(B</font></div><div><font size="4">$B")(B890-0065$B!!</;yEg;T7485(B1-21-35<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>