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2 events,
Dennis The (University of Tromso, Norway)
Dennis The Visitor (2023.1.30-2023.2.8) from University of Tromso, Norway Office: -
3 events,
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Dennis The, A Cartan-theoretic Perspective on (2,3,5)-distributions
Dennis The, A Cartan-theoretic Perspective on (2,3,5)-distributions
Speaker Dennis The UiT The Arctic University of Norway Generic rank 2 distributions on 5-manifolds, i.e. "(2,3,5)-distributions", are interesting geometric structures arising in the study of non-holonomic systems, underdetermined ODE of Monge type, conformal 5-manifolds with special holonomy, etc. The origins of their study date to Élie Cartan's "5-variables" paper of 1910, where …
3 events,
Antonio Nigro (Universidade Federal Fluminense)
Antonio Nigro Visitor (2023.2.3-2023.2.9) from Universidade Federal Fluminense Office: -
4 events,
Laurent Stolovitch (Universite Cote d’Azur, France)
Laurent Stolovitch Visitor (2023.2.4-2023.2.10) from Universite Cote d'Azur, France Office: -
5 events,
Eunjeong Lee (이은정, Chungbuk National University)
Eunjeong Lee Visitor (2023.2.6-2023.2.9) from Chungbuk National University Office: -
7 events,
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Daniele Agostini, The Martens-Mumford Theorem and the Green-Lazarsfeld Secant Conjecture
Daniele Agostini, The Martens-Mumford Theorem and the Green-Lazarsfeld Secant Conjecture
Speaker Daniele Agostini Eberhard Karls Universität Tübingen The syzygies of a curve are the algebraic relation amongst the equation defining it. They are an algebraic concept but they have surprising applications to geometry. For example, the Green-Lazarsfeld secant conjecture predicts that the syzygies of a curve of sufficiently high degree are controlled by …
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Laurent Stolovitch, Introduction to Normal Form Theory of Holomorphic Vector Fields 1
Laurent Stolovitch, Introduction to Normal Form Theory of Holomorphic Vector Fields 1
Speaker Laurent Stolovitch Universite Cote d’Azur In this short lecture, I will introduce the notion of normal form and resonances. I will also explain the phenomenon of "small divisors" and give some fundamental results of holomorphic conjugacy to a normal form.
5 events,
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Laurent Stolovitch, Introduction to Normal Form Theory of Holomorphic Vector Fields 2
Laurent Stolovitch, Introduction to Normal Form Theory of Holomorphic Vector Fields 2
Speaker Laurent Stolovitch Universite Cote d’Azur In this short lecture, I will introduce the notion of normal form and resonances. I will also explain the phenomenon of "small divisors" and give some fundamental results of holomorphic conjugacy to a normal form.
3 events,
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Yoon-Joo Kim, Isotrivial Fibrations of Compact Hyper-Kähler Manifolds
Yoon-Joo Kim, Isotrivial Fibrations of Compact Hyper-Kähler Manifolds
Speaker Yoon-Joo Kim MPI-Bonn A compact hyper-Kähler (HK) manifold and its Lagrangian fibration are higher-dimensional generalizations of a K3 surface and its elliptic fibration. A Lagrangian fibration f : X → B of a HK manifold is called isotrivial if its smooth fibers are all isomorphic to each other; this is the most …
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2 events,
Korea-Japan Conference in Algebraic Geometry
Speakers Yonghwa Cho (IBS-CCG) Junho Choe (KIAS) Yoshinori Gongyo (Tokyo U.) Kenta Hashizume (Kyoto U.) Sukmoon Huh (Sungkyunkwan U.) WonTae Hwang (Jeonbuk National U.) Seung-Jo Jung (Jeonbuk National U.) Yeongrak Kim (Pusan National U.) Tasuki Kinjo (IPMU, Tokyo) Tatsuki Kuwagaki (Kyoto U.) Shin-ichi Matsumura (Tohoku U.) Yosuke Matsuzawa (Osaka Metropolitan U.) Jinhyung Park (KAIST) Kenta …
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6 events,
Seminars on Algebraic Surfaces and Related Topics
Schedule Feb. 27 N-resolutions Giancarlo Urzua (UC Chille) 13:30-14:20 Smooth Projective Surfaces with Pseudo-effective Tangent Bundles Guolei Zhong (IBS-CCG) 14:40-15:30 Nodal Surfaces and Cubic Discriminants Yonghwa Cho (IBS-CCG) 15:50-16:40 Lagrangian Fibration Structure on the Cotangent Bundle of a Del Pezzo Surface of Degree 4 Hosung Kim (IBS-CCG) 17:00-17:50 Dinner 18:20-20:00 Feb. 28 Deformations …
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Giancarlo Urzua, N-resolutions
Giancarlo Urzua, N-resolutions
Speaker Giancarlo Urzua UC Chille (This is a part of Seminars on Algebraic Surfaces and Related Topics.) I will introduce N-resolutions, which are the negative analog of the Kollár--Shepherd-Barron (1988) P-resolutions of a 2-dimensional cyclic quotient singularity. (We instead work with the corresponding M-resolutions of Benkhe-Christophersen (1994).) I will start by describing an …
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Guolei Zhong, Smooth Projective Surfaces with Pseudo-effective Tangent Bundles
Guolei Zhong, Smooth Projective Surfaces with Pseudo-effective Tangent Bundles
Speaker Guolei Zhong IBS CCG (This is a part of Seminars on Algebraic Surfaces and Related Topics.) A vector bundle over a projective manifold is said to be pseudo-effective if the tautological line bundle of its Grothendieck projectivization is pseudo-effective. In this talk, I will show that a smooth non-uniruled projective surface S …
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Yonghwa Cho, Nodal Surfaces and Cubic Discriminants
Yonghwa Cho, Nodal Surfaces and Cubic Discriminants
Speaker Yonghwa Cho IBS CCG (This is a part of Seminars on Algebraic Surfaces and Related Topics.) In this talk, I will explain how to associate a nodal surface in P3 with a cubic hypersurface, generalizing the method by Togliatti who constructed quintics with 31 nodes via a discriminant of a nodal cubic …
4 events,
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Dongsoo Shin, Deformations of Sandwiched Surface Singularities and the Minimal Model Program
Dongsoo Shin, Deformations of Sandwiched Surface Singularities and the Minimal Model Program
Speaker Dongsoo Shin Chungnam National U. (This is a part of Seminars on Algebraic Surfaces and Related Topics.) We investigate the correspondence between three theories of deformations of rational surface singularities: de Jong and van Straten's picture deformations, Kollár's P-resolutions, and Pinkham's smoothings of negative weights. We provide an explicit method for obtaining, …
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JongHae Keum, Mori Dream Surfaces of General Type with pg=0
JongHae Keum, Mori Dream Surfaces of General Type with pg=0
Speaker JongHae Keum KIAS (This is a part of Seminars on Algebraic Surfaces and Related Topics.) The Cox ring of a variety is the total coordinate ring, i.e., the direct sum of all spaces of global sections of all divisors. When this ring is finitely generated, the variety is called Mori dream (MD). …
2 events,
Insong Choe (최인송, Konkuk University)
Insong Choe (최인송) Visitor (2023.3.1-2024.2.28) from Konkuk University Office: B255
3 events,
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Yunhyung Cho, Monotone Lagrangian Tori in Fano Varieties
Yunhyung Cho, Monotone Lagrangian Tori in Fano Varieties
Speaker Yunhyung Cho Sungkyunkwan University This is a survey talk of current progress of mirror symmetry of Fano varieties. For a given smooth Fano variety X, it has been conjectured that there exists a Laurent polynomial called a (weak) Landau-Ginzburg mirror (or weak LG mirror shortly) which encodes a quantum cohomology ring structure …