Non-trivial Hamiltonian fibrations via K-theory quantization

Princeton/IAS/Columbia Symplectic Geometry Seminar
Topic:Non-trivial Hamiltonian fibrations via K-theory quantization
Speaker:Egor Shelukhin
Affiliation:Member, School of Mathematics
Date:Friday, October 2
Time/Room:3:30pm - 4:30pm/S-101
Video Link:https://video.ias.edu/puiascolsgs/2015/1002-EgorShelukhin

We produce examples of non-trivial Hamiltonian fibrations that are not detected by previous methods (the characteristic classes of Reznikov for example), and improve theorems of Reznikov and Spacil on cohomology-surjectivity to the level of classifying spaces. Joint work with Yasha Savelyev.