# Taipei Postdoc Seminar

## May 15, 2019 (Wed.) 11:00-12:30 Sasha Minets (IST Austria) Venue: Room 201, Astro-Math. Building Title:Cohomological Hall algebras and sheaves on surfaces

Abstract:

I will start with a quick survey of classical and cohomological Hall algebras. For that, I will recall how combinatorics of the Hilbert scheme of points on a plane are governed by the action of elliptic Hall algebra. In the second part of the talk, I will explain how certain aspects of this story can be generalized to the moduli spaces of sheaves on other surfaces, such as cotangent bundle to a curve.

2016

## Jan. 3, Sheng-Fu Chiu (AS) Wrapped Microlocal Sheaves II Jan. 4, Sheng-Fu Chiu (AS) Wrapped Microlocal Sheaves III Jan. 18,Yi-ning Hsiao (University of Geneva) The E-polynomials of a stratification of the Hilbert scheme of points.--

### The Taipei Postdoc Seminar is a weekly seminar that is organized jointly by the Institute of Mathematics of Academia Sinica and the National Center for Theoretical Sciences during the regular academic year. The seminar is held in these two mathematical institutions, with each one of them hosting the event approximately once every two weeks. The National Taiwan University, Academia Sinica, and the NCTS, together employ a significant number of postdoctoral fellows in mathematics from all over the world every year. The diverse scientific and cultural backgrounds of these postdocs create a unique environment of learning, and the goal of the Taipei Postdoc Seminar is to take advantage of this opportunity by bringing together all these postdocs once in a week in an informal-style seminar to enhance discussions and exchange of ideas among the participants. It is our belief that not only will this seminar encourage and eventually lead to more collaboration among mathematicians in Taipei, but it will also give the participants a chance to broaden their own scientific viewpoints. It is our hope that this seminar will greatly enrich the academic experience of the postdoctoral fellows during their stay in Taipei. Organizers: Sheng-Fu Chiu (sfchiu@gate.sinica.edu.tw), Chien-Hsun Wang (chwang@ncts.ntu.edu.tw)

Former organisers