talks

Recent Talks

2019-07/30 "Calabi--Yau and Geometry" at IMS, CUHK. Title: A Mysterious Connection between Complex Elliptic Genera and Lame Equations, webpage.
2019-06/11 Plenary speech in "The 8th International Congress of Chinese Mathematicians ICCM 2019" at Tsinghua University, Beijing. Title: Quantum Flips, slides.
2019-01/15/18/22 "Mathematics inspired by String Theory" at Institute of Mathematical Sciences, CUHK. Lecture series speaker. Title: Introduction to the Quantum Invariance Problem I, II, III, slides I, slides II, slides III.
2018-12 "The second ICCM Annual Meeting" at Taipei. Title: Toward A + B Theory in Conifold Transitions of Calabi--Yau 3-folds, slides.
2018-12/23 "40 Years of Calabi--Yau Theory" at Jiaoling, Guangzhou. Title: Calabi--Yau without Maximal Degenerations, slides.
2017-12/28 "The first ICCM Annual Meeting" at Guangzhou, Title: Algebraic Methods in Periodic Singular Liouville Equations, slides.
2017-05/11 "The Algebraic and Arithmetic Geometry Conference, AGAG2017" at University of Science and Technology of China, Hefei. Title: A Quantum Splitting Principle, slides.
2017-04/23 "Perspectives of Mathematics in the 21st Century: Confernce in Celebration of the 90th Anniversay of Mathematics Department of Tsinghua University" at Tsinghua U., Beijing. Title: Aspects of Calabi--Yau Moduli, slides.
2016-06/07 “Workshop on Global Mirror Symmetry” at Chern Institute, Nankai webpage. Title: Quantum Cohomology under Flips.
2016-03/05 "4th Beijing Algebraic Geometry Colloquium" at AMSS, Beijing abstracts. Title: Simple Flips and Quantum Cohomology.
2016-03/02 "中國科學院數學所講座" at Academy of Mathematics and System Science, Beijing link to video. Title: K 等價與代數閉鏈, 投影片.
2016-01/01 Plenary Speech in "String-Math 2015 Conference, December 31, 2015 - January 4, 2016" at Tsinghua Sanya International Mathematcs Forum (TSIMF), Sanya webpage. Title: Quantum Cohomology under Birational Maps and Transitions, slides.
2015-10-30 "Workshop on Algebraic Geometry AG2015" at Fudan University, Shanghai webpage. Title: Quantum Cohomology in Birational Geometry.
2015-09/07 "The Algebraic and Arithmetic Geometry Conference AGAG 2015" at University of Science and Technology of China, Hefei webpage. Title: Extensions of the Gauss--Manin Connections Along Conifold Trnasitions of Calabi--Yau 3-folds.
2015-07/16 "Uniformizations, Riemann--Hilbert Correspondence, Calabi--Yau Manifolds, and Picard--Fuchs Equations" at Institut Mittag-Leffler, Sweden webpage. Title: Extensions of the Gauss--Manin Connections Along Conifold Trnasitions of Calabi--Yau 3-folds.

Some Earlier Talks

2014-08/04 "60 Years of Calabi Conjecture -- A Workshop in Honor of Professor Shing-Tung Yau on the Occasion of his 65th Birthday" at Tsinghua University, Beijing webpage. Title: Quantum Invariance under Conifold Transitions, written slides.
2014-06/30 "NCTS Meet with Professor Ngaiming Mok" at NCTS, Hsinchu webpage. Title: Mean Field Equations, Hyperelliptic Curves, and Modular Forms, written slides.
2014-03/24-25 Two Lectures in "The 6th TIMS-OCAMI-WASEDA Joint International Workshop on Integrable Systems and Mathematical Physics" at Taida Institute for Mathematical Sciences webpage. Title: Mean Field Equations, Hyperelliptic Curves and Modular Forms I, II, slides.
2013-07/18 Plenary Speech in "The 6th International Congress of Chinese Mathematicians ICCM 2013" at National Taiwan University webpage. Title: Geometric Transitions and Quantum Invariance, slides
2013-03/25 "The 5th OCAMI-TIMS Joint International Workshop on Differential Geometry and Geometric Analysis, March 25--27" at Osaka City University webpage. Title: Mean Field Equations and Algebraic Geometry, manuscript.
2012-09/26 "TIMS-Academia Sinica-NCTS Joint Seminar on Modular Forms" at Taida Institute for Mathematical Sciences. Title: Mean Field Equations, Lame Equations and Modular Forms, slides.
2012-09/18 "Featured Invited Talk by Mathematical Society of Japan in the 2012 Autumn Meeting" at Kyushu University, Fukouka. Title: Quantum Leray--Hirsh and Analytic continuations, link to video.
2011-12/19 "Recent Progress on Moduli Spaces and Special Varieties (The Second Tsinghua Sanya International Mathematics Forum)" at Sanya, webpage. Title: Gluing Quantum D Modules over Flops, talk summary in pdf.
2011-12/04 "Pacific Rim Geometry Conference" at Osaka University. Title: Quantum Leray--Hirsch, slides.
2011-09/02 "Kobe Workshop on Quantum Cohomoogy and Integrable Systems" at Kobe University webpage. Title: Extension of Quantum D Modules and Its Application to Analytic Continuations.
2011 Invited Talk in "Annual Meeting of Mathematical Society of Japan". Title: Analytic Continuations of GW Theory, submitted article in pdf. Meeting postponed due to tsunami, webpage.
2011-01/12 "Colloquium at Department of Mathematics, National Unievrsity of Singapore". Title: Critical Points of Green Functions on Flat Tori, slides.
2011-01/06 "Workshop on Algebraic Geometry, Complex Dynamics and their Interaction Janaury 4-7" at University of Singapore webpage. Title: Extensions of Multiply Twisted Pluricanonical Forms, manuscript.
2010 03/29-04/02 "TIMS-NCTS Workshop on Higher Dimensional Algebraic Geometry, a Conference in Memory of Eckart Viehweg" at National Taiwan University webpage. Title: Analytic Continuations of Quantum Cohomology under Ordinary Flops, manuscript, talk summary in pdf.
2009-12/08 "Mirror Symmetry and Gromov--Witten Invariants" at University of Tokyo webpage. Title: Analytic Continuations of Quantum Cohomology under Ordinary Flops, manuscript.
2009-10/12 "Presentation for MOE National Chair Professorship" at Taida Institute for Mathematical Sciences. Title: A + B model in Quantum Geometry, slides.
2008-8/28 "Geometric Analysis: Prrsent and Future. An International Conference to Celebrate the Birthday of Shing-Tung Yau" at Harvard University 8.27-9.1, 2008 webpage. Title: Quantum Invariance under Flops and Transitions, slides.
2008 April "Algebraic Geometry Seminar" at Laboratoire Laray, Nantes. Title: Invarinace of Big Quantum Ring under Flops, manuscript.
2007-11/11 "Algebraic Geometry and Commutative Algebra Tokyo 2007 --- The 130 Anniversary of Tokyo University" at University of Tokyo webpage. Title: On the Invariance Problem of Quantum Cohomology under Flops.
2006-12/20 "International Conference in Geometry" at The Institute of Mathematical Sciences, The Chinese University of Hong Kong webpage. Title: Invariance of Big Quantum Ring Under Simple Flops, manuscript.
2005-11/18 "Geometric Quantizations and Related Complex Geometry November 16--19, 2005" at Nagoya University, abstracts. Title: Green Functions on Tori and the Mean Field Equations.
2004-12/20 Plenary Speech in "The 3rd International Congress of Chinese Mathematicians ICCM 2004" at Chinese University of Hong Kong. Title: The Role of Chern Classes in Birational Geometry, slides.
2004-09/06 "Chinese-German Conference in Complex Geometry" at Chinese-German Culture Exchange Center, Beijing. Title: Ordinary Flops, slides.
2004-07/14 "Colloquium at Department of Mathematics, National Taiwan University". Title: Mathematics on Tori, slides.
2004-03/22 "NCTS Workshop on Higher Dimensional Algebraic Geometry" at National Taiwan University. Title: Quasi-Hodge Metrics and Canonical Singularities, manuscript.
2002-10/26 "Hong Kong Geometry Colloquium" at Hong Kong Universty of Sciences and Technology. Title: Geometry of the First Chern Class, manuscript.
2002-08/17 "ICM-2002 Satellite Conference in Algebraic Geometry" at East China Normal University, Shanghai webpage. Title: K-equivalence in Birational Geometry, abstract, slides.
2002-02/18 "Algebraic Geometry Conference (Iitaka 60)" at Tokyo University. Title: K-equivalence in Birational Geometry, manuscript.
2001-12/18 "The 2nd International Congress of Chinese Mathematicians ICCM 2001" at Grand Hotel, Taipei. Title: K-equivalence in Birational Geometry, slides.
2001 June "DFG Program: Global Methods in Complex Geometry" at University of Marburg, Marburg.
2001 May "Symplectic Geometry Seminar" at Wisconsin University, Madison.
2001 April "Topology and Geometry Seminar" at Princeton University, Princeton. Title: Change of Variable for Complex Genera and Its Applications to Higher Dimensional Flops, manuscript.
2001 March "Differential Geometry Seminar" at Harvard University, Cambridge.
2000 January "Oberseminar" at University of Essen, Essen. Title: K-equivalence in Birational Geometry, manuscript. 2nd seminar talk at 01/26, manuscript.
1999 "Algebra Seminar" at University of Pennsylvania, Pennsylvania.
1998 "Colloquium at Department of Mathematics, National Taiwan University". Title: Cohomology Theory of Birational Geometry, manuscript.