SIMIS Seminar on Derived and Noncommutative Geometry: Enumerative Invariants from Calabi-Yau categories
Speaker: Junwu Tu (Shanghai Tech) Abstract: In the first half, we shall begin by recalling the fact that Hochschild cohomology of an associative algebra has a Gerstenhaber algebra structure. Then we discuss its chain level extension (conjectured by Deligne) that the Hochschild cochain complex carries an E2-algebra structure. Finally, we shall describe the construction of …