Department of

# Mathematics

Seminar Calendar
for events the day of Thursday, December 11, 2014.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
    November 2014          December 2014           January 2015
Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa
1       1  2  3  4  5  6                1  2  3
2  3  4  5  6  7  8    7  8  9 10 11 12 13    4  5  6  7  8  9 10
9 10 11 12 13 14 15   14 15 16 17 18 19 20   11 12 13 14 15 16 17
16 17 18 19 20 21 22   21 22 23 24 25 26 27   18 19 20 21 22 23 24
23 24 25 26 27 28 29   28 29 30 31            25 26 27 28 29 30 31
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Thursday, December 11, 2014

1:00 pm in 239 Altgeld Hall,Thursday, December 11, 2014

#### IGL Open House

Abstract: The Illinois Geometry Lab will hold an Open House from 1:00 - 5:00 pm on Thursday, Dec 11, in 239 Altgeld Hall.

1:00 pm in 243 Altgeld Hall,Thursday, December 11, 2014

#### Introduction to Spectral Networks, III

###### Daniele Alessandrini (Heidelberg)

Abstract: Abstract: I will give an introduction to the theory of Spectral Networks, developed by Gaiotto, Moore and Neitzke during their research about supersymmetry. These objects have an independent interest for mathematicians, mostly in the theory of surfaces. They can be described as combinatorical objects on the surface, or, equivalently as some orbits associated to a conformal structure on the surface and a collection of holomorphic differentials. The main focus will be on how to use these objects to give coordinates on the moduli spaces of representations of surface groups. These coordinates generalise Fenchel-Nielsen coordinates and Fock-Goncharov coordinates in an especially intriguing way. This is the third of a three lecture series.