Insong Choe (최인송, Konkuk University)
Insong Choe (최인송) Visitor (2023.3.1-2024.2.28) from Konkuk University Office: B255
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Calendar of Events
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School and Workshop on Moduli, K-trivial Varieties, and Related Topics
Speakers for Mini-courses (Feb 21~23) Harold Blum (University of Utah) Radu Laza (Stony Brook University) Colleen Robles (Duke University) Speakers for Workshop (Feb 21~23, and 26-29) Kenneth Ascher (UC Irvine) Philip Engel (Univ. of Bonn) Laure Flapan (Michigan State University) Yoon-Joo Kim (Columbia University) Kyoung-Seog Lee (POSTECH) Zhiyuan Li (SCMS, Fudan University) Yuchen Liu (Northwestern …
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Gebhard Martin, Automorphisms of del Pezzo Surfaces I
Gebhard Martin, Automorphisms of del Pezzo Surfaces I
Speaker Gebhard Martin Universität Bonn Motivated by the classification of finite subgroups of the Cremona group of the plane, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del …
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Claudia Stadlmayr, Which Rational Double Points Occur on del Pezzo Surfaces?
Claudia Stadlmayr, Which Rational Double Points Occur on del Pezzo Surfaces?
Speaker Claudia Stadlmayr Technische Universität München Canonical surface singularities, also called rational double points (RDPs), can be classified according to their dual resolution graphs, which are Dynkin diagrams of types A, D, and E. Whereas in characteristic different from 2, 3, and 5, rational double points are "taut", that is, they are uniquely …
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Gebhard Martin, Automorphisms of del Pezzo Surfaces II
Gebhard Martin, Automorphisms of del Pezzo Surfaces II
Speaker Gebhard Martin Universität Bonn Motivated by the classification of finite subgroups of the Cremona group of the plane, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del …
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Gebhard Martin, Automorphisms of del Pezzo Surfaces III
Gebhard Martin, Automorphisms of del Pezzo Surfaces III
Speaker Gebhard Martin Universität Bonn Motivated by the classification of finite subgroups of the Cremona group of the plane, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del …
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Boris Doubrov, Bifiltered Parabolic Geometries
Boris Doubrov, Bifiltered Parabolic Geometries
Speaker Boris Doubrov Belarusian State University, Minsk We introduce the notion of a bifiltered manifold and generalizing the constructions of the symbol and Tanaka prolongation from nilpotent differential geometry. Next, we consider bifiltered manifolds modeled by bigradings of simple Lie algebras and show how this generalizes known constructions in the parabolic geometries such …
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Dennis The, On 4D Split-conformal Structures with G2-symmetric Twistor Distribution
Dennis The, On 4D Split-conformal Structures with G2-symmetric Twistor Distribution
Speaker Dennis The The Artic University of Norway, Tromso In their 2013 article, An & Nurowski considered two surfaces rolling on each other without twisting or slipping, and defined a twistor distribution (on the space of all real totally null self-dual 2-planes) for the associated 4D split-signature conformal structure. If this split-conformal structure …
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Yong Hu, Noether Inequality for Irregular Threefolds of General Type
Yong Hu, Noether Inequality for Irregular Threefolds of General Type
Speaker Yong Hu Shanghai Jiao Tong University Let X be a smooth irregular 3-fold of general type. In this talk, we will prove that the optimal Noether inequality vol(X) ≥ (4/3) pg(X) holds if pg(X) ≥ 16 or if X has a Gorenstein minimal model. Moreover, when X attains the equality and pg(X) …