Seminars and Colloquia by Series

Stein fillings on Lens spaces.

Series
Geometry Topology Student Seminar
Time
Wednesday, October 5, 2011 - 14:05 for 1 hour (actually 50 minutes)
Location
Skiles 005
Speaker
Amey KalotiGeorgia Tech
In this talk we will outline proof due to Plameneveskaya and Van-Horn Morris that every virtually overtwisted contact structure on L(p,1) has a unique Stein filling. We will give a much simplified proof of this result. In addition, we will talk about classifying Stein fillings of ($L(p,q), \xi_{std})$ using only mapping class group basics.

Algebraic and geometric aspects of Braid Groups

Series
Geometry Topology Student Seminar
Time
Wednesday, September 28, 2011 - 14:05 for 1 hour (actually 50 minutes)
Location
Skiles 005
Speaker
Marta AguileraGeorgia Tech
In this talk I define the braid groups, its Garside structure, and its application to solve the word and conjugacy problems. I present a braid group with $n$ strands as the mapping class group of the disk with $n$ punctures, $\mathbb{D}^2-\{p_1\ldots p_n\}$, and a classification of surface homeomorphisms by the Nielsen Thurston theorem. I will also discuss results that require algebraic and geometric tools.

Pages