|Speaker:||Zheng Hua (U of Hong Kong)|
|Title:||orientation data and quantization|
|Date (JST):||Mon, Jul 01, 2013, 14:00 - 17:00|
|Place:||Seminar Room A|
In the first part of my talk, I will discuss some general questions about quantization of Donaldson-Thomas invariants from geometric point of view. A necessary condition to quantize DT invariants is to show the moduli space has a consistent choice of spin structures. This leads to a definition of orientation data (by Kontsevich and Soibelman).
In the second part, I will present a proof of existence of orientation data on torsion free Calabi-Yau threefolds.