# Taipei Postdoc Seminar

## Oct. 27 (Wed.) 14:00-15:00 Oguz Gezmis (National Center for Theoretical Sciences) Venue: Lecture Hall 5F, Cosmology Building, NTU Title: On Drinfeld Modules, Drinfeld Modular Forms and Multiple Zeta Values in Positive Characteristic

Abstract:

In 1974, Drinfeld introduced “elliptic modules” -which are now called Drinfeld modules- serving as one of the tools for his solution to the Langlands conjectures for GL2 in the global function field case. In this talk, we discuss some properties of L-functions attached to them as well as Drinfeld modular forms which were firstly defined and studied by David Goss in his PhD thesis. Moreover, we introduce multiple zeta values in the positive characteristic setting and survey several fundamental results in this direction whose analogous statements for multiple zeta values of Euler are still unknown.

2016

## Jan. 13, You Hung Hsu (NCTS) Exceptional Collections, t-structures and Categorical Action Mar. 10, Shih-Yu Chen (AS) On Deligne's Conjecture for Symmetric Fourth L-functions of Hilbert Modular Forms Mar. 24, Wei-Guo Foo (AS) Some Remarks on Second Order Ordinary Differential Equations Apr. 7, Jun-Wen Peng (University of Rochester) An Embedding of the Arboreal Galois Group for PCF Map Apr. 21, Yan-Yu Chen (NTU) Global Dynamics on One-dimensional Excitable Media [Cancellation] May 19, Guan-Ru Yu (Institute of Statistical Science, Academia Sinica) Bijections for Ranked Tree-Child Networks-- Sep. 29, Yen-An Chen (NCTS) Boundedness of Canonical Models of Foliated Surfaces Oct. 13, Iacopo Brivio (NCTS) On Deformation Invariance of Plurigenera in Positive and Mixed Characteristic

### 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: Jun-Wen Peng (wayne.peng@ncts.tw), Yi-Sheng Wang (yisheng@gate.sinica.edu.tw)

Former organisers