Half grid diagrams and Thompson links

Series
Geometry Topology Seminar
Time
Monday, August 26, 2024 - 2:00pm for 1 hour (actually 50 minutes)
Location
Skiles 006
Speaker
Shunyu Wan – Georgia Tech
Organizer
John Etnyre

Thompson links are links arising from elements of the Thompson group. They were introduced by Vaughan Jones as part of his effort to construct a conformal field theory for every finite index subfactor. In this talk I will first talk about Jones' construction of Thompson links. Then I will talk about grid diagrams and introduce a notion of half grid diagrams to give an equivalent construction of Thompson links and further associate with each Thompson link a canonical Legendrian type. Lastly, I will talk about some applications about the maximal Thurston-Bennequin number and presentation of link group. This is joint work with Yangxiao Luo.