Algebraic Geometry Seminar
Fall 2023 — Tuesdays 3:30  4:30 PM
LCB 323
Join the Algebraic Geometry mailing list for updates + announcements.Date  Speaker  Title — click for abstract (if available) 
September 5th 
Lei Wu Zhejiang University 
Log geometry and log Dmodules
The theory of Dmodules provides very powerful tools and solved many important problems. In this talk, I will introduce a natural way to generalize the Dmodule theory in logarithmic geometry. I will explain log Bernstein inequality and define log holonomic Dmodules on smooth log schemes. Then I will explain log constructibility by using KatoNakayama spaces associated to log schemes. If time allowed, I will also explain how the theory is related to the classical bfunction theory as well as log RiemannHilbert correspondence. This is based on an ongoing project with Andreas Hohl.

September 12th 
Jihao Liu Northwestern University 
Minimal model program for foliations and generalized pairs
In this talk, I will report recent progress on the minimal model program for foliations, applying the theory of BirkarZhang’s generalized pairs. Particularly, I will discuss the ACC for lc thresholds and the canonical bundle formula for foliations. Part of this talk is based on a series of joint works with Omprokash Das, Yujie Luo, and Roktim Mascharak, Fanjun Meng, and Lingyao Xie.

September 19th 
HsinKu Chen KIAS 
On the Chern numbers of smooth complex threefolds
We show that the Chern numbers of a smooth complex projective threefold are bounded by a constant which depends only on the topological type of the threefold, provided that the cubic form of the threefold has nonzero discriminant. This is a joint work with Paolo Cascini.

September 26th 
Sung Gi Park Harvard University 
Kodaira dimension and hyperbolicity for smooth families of varieties
In this talk, I will discuss the behavior of positivity, hyperbolicity, and Kodaira dimension under smooth morphisms of complex quasiprojective manifolds. This includes a vast generalization of a classical result: a fibration from a projective surface of nonnegative Kodaira dimension to a projective line has at least three singular fibers. Furthermore, I will explain a proof of Popa's conjecture on the superadditivity of the log Kodaira dimension over bases of dimension at most three. These theorems are applications of the main technical result, namely the logarithmic base change theorem.

October 3rd 
Brian Lehmann Boston College 

October 17th 
Charles Vial Universität Bielefeld 

October 24th 


October 31st 
Sridhar Venkatesh University of Michigan 

November 7th 
C. Eric OvertonWalker University of Arkansas 

November 14th 
Swaraj Pande University of Michigan 

November 21st Virtual 
Liana Heuberger University of Bath 

November 28th 
Alicia Lamarche University of Utah 

December 5th 
Chengxi Wang UCLA 

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