The SGGTC seminar meets on Fridays in Math 520 from 10:30-11:30am and in Math 407 from 1-2pm, unless noted otherwise (in red).

Previous semesters: Fall 2018, Spring 2018, Fall 2017, Spring 2017, Fall 2016, Spring 2016, Fall 2015, Spring 2015, Fall 2014, Spring 2014, Fall 2013, Spring 2013, Fall 2012, Spring 2012, Fall 2011, Spring 2011, Fall 2010, Spring 2010, Fall 2009, Spring 2009, Fall 2008, Spring 2008, Fall 2007.

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SGGTC Seminar Schedule
 
Date Speaker Title
Jan. 25, 10:30am
TBA
TBA
Jan. 25, 1pm
TBA
TBA
Feb. 1, 10:30am
Anton Zeitlin (Louisiana State)
TBA
Feb. 1, 1pm
Florent Schaffhauser (Universidad de Los Andes and Université de Strasbourg)
Higher Teichmüller spaces for orbifolds
Feb. 8, 10:30am
TBA
TBA
Feb. 8, 1pm
TBA
TBA
Feb. 15, 10:30am
TBA
TBA
Feb. 15, 1pm
TBA
TBA
Feb. 22, 10:30am
TBA
TBA
Feb. 22, 1pm
TBA
TBA
Mar. 1, 10:30am
TBA
TBA
Mar. 1, 1pm
Yaron Ostrover (IAS and Tel Aviv University)
TBA
Mar. 8, 10:30am
TBA
TBA
Mar. 8, 1pm
TBA
TBA
Mar. 15, 10:30am
TBA
TBA
Mar. 15, 1pm
TBA
TBA
Mar. 22
Spring break!
Mar. 29, 10:30am
TBA
TBA
Mar. 29, 1pm
TBA
TBA
Apr. 5, 10:30am
TBA
TBA
Apr. 5, 1pm
TBA
TBA
Apr. 12, 10:30am
TBA
TBA
Apr. 12, 1pm
TBA
TBA
Apr. 19, 10:30am
TBA
TBA
Apr. 19, 1pm
TBA
TBA
Apr. 26, 10:30am
TBA
TBA
Apr. 26, 1pm
TBA
TBA
May 3, 10:30am
TBA
TBA
May 3, 1pm
TBA
TBA

 

 

Abstracts

February 1st, 2018: Florent Schaffhauser (Universidad de Los Andes and Université de Strasbourg) " Higher Teichmüller spaces for orbifolds "

Abstract: The Teichmüller space of a compact 2-orbifold X can be defined as the space of faithful and discrete representations of the fundamental group of X into PGL(2,R). It is a contractible space. For closed orientable surfaces, "Higher analogues" of the Teichmüller space are, by definition, (unions of) connected components of representation varieties of $\pi_1(X)$ that consist entirely of discrete and faithful representations. There are two known families of such spaces, namely Hitchin representations and maximal representations, and conjectures on how to find others. In joint work with Daniele Alessandrini and Gye-Seon Lee, we show that the natural generalisation of Hitchin components to the orbifold case yield new examples of Higher Teichmüller spaces: Hitchin representations of orbifold fundamental groups are discrete and faithful, and share many other properties of Hitchin representations of surface groups. However, we also uncover new phenomena, which are specific to the orbifold case.

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Announcements for this seminar, as well as for related seminars and events, are sent to the "Floer Homology" e-mail list maintained via Google Groups.