Donggun Lee

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  • Donggun Lee, Birational Geometry of Generalized Hessenberg Varieties and the Generalized Shareshian-Wachs Conjecture

    B236-1 IBS, Korea, Republic of
    Complex Geometry Seminar

        Speaker Donggun Lee IBS-CCG Hessenberg varieties are subvarieties of flag varieties with interesting properties in both algebro-geometric and combinatorial perspectives. The Shareshian-Wachs conjecture connects their cohomology with the chromatic quasi-symmetric functions of the associated graphs, which are refinements of the chromatic polynomials. In this talk, we introduce generalized Hessenberg varieties and study their …

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  • Workshop on Torus Actions in Symplectic and Algebraic Geometry

    IBS Science Culture Center Daejeon, Korea, Republic of
    Conferences and Workshops

    Lecture Series Kiumars Kaveh (University of Pittsburgh) Hendrik Süß (University of Jena)* Susan Tolman (University of Illinois at Urbana-Champaign) Research Talks Lara Bossinger (UNAM) Isabelle Charton (University of Haifa) Oliver Clarke (University of Edinburgh) Peter Crooks (Utah State University) Naoki Fujita (Kumamoto University) Yoosik Kim (Pusan National University) Donggun Lee (IBS CCG) Joseph Palmer (University …

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  • Workshop on Algebraic Geometry in Busan

    La Valse Hotel Busan, Korea, Republic of
    Conferences and Workshops

    Speakers Lorenzo Barban (IBS-CCG) Jungkai Chen (National Taiwan University) Toshiyuki Katsura (University of Tokyo) Shigeyuki Kondo (Nagoya University) Ching-Jui Lai (National Cheung Kung University) Donggun Lee (IBS-CCG) Hsueh-Yung Lin (National Taiwan University) Shigeru Mukai (Kyoto University) Keiji Oguiso (University of Tokyo) Abstracts PDF file Schedule May 14 (Tuesday) 14:00~14:20 Registration 14:20~15:20 Oguiso 15:40~16:40 Lai 17:00~18:00 …

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  • Combinatorics on flag varieties and related topics 2025

    Ajou University Suwon, Korea, Republic of
    Conferences and Workshops

    Speakers Tatsuyuki Hikita (RIMS) Byung-Hak Hwang (KIAS) Takeshi Ikeda (Waseda University) Minyoung Jeon (University of Georgia) Donggun Lee (IBS-CCG) Eunjeong Lee (Chungbuk National University) Seung Jin Lee (Seoul National University) Mikiya Masuda (OCAMI) Seonjeong Park (Jeonju University) Martha Precup (Washington University in St. Louis) Mark Skandera (Lehigh University) John Shareshian (Washington University in St. Louis) …

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  • Workshop on Hessenberg varieties, Lusztig varieties, and Affine Grassmannians

    B109 IBS, Korea, Republic of
    Conferences and Workshops

      This workshop brings together experts in Hessenberg varieties, Lusztig varieties, and the affine Grassmannian. It focuses on the rich interactions among these geometric objects and their connections to representation theory and combinatorics. Recent breakthroughs and new developments will be presented and discussed. The workshop aims to foster collaboration and inspire future research. Invited Speakers …

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  • Moduli of Surfaces and Beyond

    IBS Science Culture Center Daejeon, Korea, Republic of
    Conferences and Workshops

      Speakers Lecture Series (3hr) Radu Laza (Stony Brook University) Matthias Schütt (Leibniz Universität Hannover) Jenia Tevelev (University of Massachusetts Amherst) Research Talks (1hr) Kenneth Ascher (University of California, Irvine) Dori Bejleri (University of Maryland, College Park) Harold Blum (Georgia Institute of Technology) Nathan Chen (Harvard University) Changho Han (Korea University) Donggun Lee (IBS-CCG) Samouil …

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