Taipei Postdoc Seminar

Upcoming Talk

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


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.

Previous Talks


Sep.14, Jyun-Ao Lin (AS) On the number of commuting matrices and Kac polynomials
Sep.21, Chih-Wei Chen (NCTS) The Ricci flow - a chronological survey
Sep.29, Hiep Dang (NCTS) Identities involving (doubly) symmetric polynomials and integrals over Grassmannians
Oct.5, Haitao Wang (AS) Wave structures in Bolzmann and Landau equations
Oct.12, Kazuya Kawasetsu (AS) Uniqueness of a class of holomorphic vertex operator algebras of central charge 24

Oct.19, Edward Ho (NCTS) Blob-Based Super-Resolution Image Reconstruction
Oct.26, Yu-Yen Chien (NCTS) An Introduction to Hyperbolic Groups
Nov.2, Atsushi Yamamori (AS) An How to compute Bergman kernel functions
Nov.9, Chan-Liang Chung (AS) Sum formulas of multiple zeta values with arguments are multiple of a positive integer
Nov.16, Jui-En Chang (NTU) The bounds of Hausdorff measure of nodal sets
Nov.23, Nadim Rustom (NCTS) A Promenade Along Modern Algebraic Number Theory
Dec.7, Manas Kar (NCTS) Inverse parameter identification problems for p-Laplace equation
Dec.14, Liao He (AS) Enumeration of convex polytope
Dec.21, Tse-Chung Yang (AS) Counting isoclasses superspecial abelian surfaces over finite fields


Jan.4, Gyeongha Hwang (NCTS) Deterministic and probabilistic analysis of nonlinear dispersive equation
Feb.22, Tomohiro Uchiyama(NCTS) Complete reducibility, geometric invariant theory, and spherical buildings
Mar.1, Yusuke Shimabukuro (AS) Stochastic six vertex model
Mar.15, Yongjie Wang (NCTS) Central Extensions of Matrix Lie Superalgebras
Mar.22, Chien-Hao Huang (NCTS) To collapse or not to collapse, that is the question.
Mar.29, Saud Hussein (AS) Sieve methods in analytic number theory.
Apr.12, Guokuan Shao (AS) Equidistribution of zeros of random holomorphic sections
Apr.19, Tien-Tsan Shieh (NCTS) Ground State Patterns and Phase Transition of Spin-1 Bose-Einstein Condensates via Γ-Convergence Theory
Apr.26, Chi-Kwong Fok (NCTS) Representation stability and moduli spaces
May 3, Yasuhiro Terakado (As) The determinant and the discriminant of a complete intersection of even dimension
May 10, Wan-Yu Tsai (AS) A brief introduction to nilpotent orbits and the orbit philosophy
May 17, Yang-Kai Lue (NCTS) The stability of self-shrinkers of mean curvature flow
May 24, Jia-Rui Fei (NCTS) The recreation I did for the past five years
May 31, Hsiao-Fan Liu (As) An introductory on discrete versions of Painlevé equations
Jun. 7, Taiji Marugame (AS) Construction of global CR invariants via Cheng-Yau metric
Jun. 14, Chih-Whi Chen (NCTS) Affine periplectic Brauer algbera
Jun. 28, Catalin Carstea (NCTS) Uniqueness for the inverse boundary value problem of anisotropic elasticity with piecewise constant coefficients
Sep. 6, Hsieh-Yung Lin (Universitaet Bonn) Some pieces of frontiers between symplectic, Kahler, and algebraic geometry
Sep. 20, Hiep Dang (NCTS) SQuantum cohomology of the Lagrangian Grassmannian
Oct. 11, Hung-Yu Yeh (AS) Effective action from $M$-theory on twisted connected sum $G_2$-manifolds
Oct. 25, Nobuo Sato (NCTS) Confluence relations for the multiple zeta values
Nov. 22, Sheng-Fu Chiu (AS) Categorification and Contact Non-squeezing.
Dec. 06, Peng-Jie Wong (PIMS) Group theory and the Artin holomorphy conjecture
Dec. 20, Guanghui Jin (NCTS) Remarks on Chern-Simons gauged O(3) sigma model in one space dimension


Apr. 18, Chao Zhang (AS) The Kuga-Satake Constructions and Newton Stratifications on Orthogonal Shimura Varieties
May 2, Kian Chuan Ong (NCTS) Finite Difference Method for Numerical Simulation of Incompressible Fluid Flow
May 16, Kei Yuen Chan (University of Georgia) Branching rules for reductive groups
May 30, Chia-Yu Hsieh (NCTS) A Poisson-Nernst-Planck Model with Singular Permanent Charges
Sep. 20, Hsuan-Yi Liao (Penn. State University) Formality Theorem for Differential Graded Manifolds
Oct. 11, Chien-Hsun Wang (NCTS) Kuranishi structures of the moduli spaces of J-holomorphic curves
Oct. 17, Ryo Sato (AS) On Zhu's algebra of N=2 vertex operator superalgebras
Oct. 24, Hao Qi (AS) Maximum d-degenerate subgraph of a planar graph
Oct. 25, Chien-Hsun Wang (NCTS) Introduction of the wrapped Fukaya category
Oct. 30, Zhibin Du (AS) Combinatorial properties of real symmetric matrices related to the multiplicity of eigenvalues
Nov. 7, Kyung-youn Kim (AS) Estimates of heat kernel for symmetric Markov processes.
Nov. 15, Chien-Hsun Wang (NCTS) Generation of the Fukaya category
Nov. 28, Yao Cheng (AS) Special Value Formulae for the Twisted Triple Product and Applications
Nov. 29, Chien-Hsun Wang (NCTS) Generation of the Fukaya category II
Dec. 13, Sheng-Fu Chiu (AS) Introduction to wrapped microlocal sheavesWrapped Microlocal Sheaves


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 (, Chien-Hsun Wang (

Former organisers

Yu-Yen Chien (NCTS):Sep. 2016~Jun. 2017
Jyun-Ao Lin (AS): Sep. 2016~May 2018
Yang-Kai Lue (NCTS): Sep. 2017~May 2018