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Title:
Higher genus Grothendieck-Teichmüller Lie algebras

Speaker:
Matteo Felder

Abstract:
The Grothendieck-Teichmüller Lie algebra grt was introduced by Drinfeld and is a mysterious object which has many applications in algebra, geometry and topology. An important result by Willwacher identifies grt with the degree zero cohomology of Kontsevich's graph complex GC, itself an interesting combinatorial object whose cohomology in positive degrees is unknown.

Link:
http://scgp.stonybrook.edu/video_portal/video.php?id=3706

Workshop:
Simons- Program: Poisson geometry of moduli spaces, associators and quantum field theory