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PRODID:-//Center for Complex Geometry - ECPv6.16.2//NONSGML v1.0//EN
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X-WR-CALNAME:Center for Complex Geometry
X-ORIGINAL-URL:https://ccg.ibs.re.kr
X-WR-CALDESC:Events for Center for Complex Geometry
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BEGIN:VTIMEZONE
TZID:Asia/Seoul
BEGIN:STANDARD
TZOFFSETFROM:+0900
TZOFFSETTO:+0900
TZNAME:KST
DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20220815
DTEND;VALUE=DATE:20230815
DTSTAMP:20260528T045010
CREATED:20220926T052830Z
LAST-MODIFIED:20230119T042344Z
UID:1755-1660521600-1692057599@ccg.ibs.re.kr
SUMMARY:Jinhyun Park (박진현\, KAIST)
DESCRIPTION:Jinhyun Park (박진현) \nVisitor (2022.8.15-2023.8.14) from KAIST\nOffice: B248
URL:https://ccg.ibs.re.kr/event/220815-230814/
CATEGORIES:Visitors
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230301
DTEND;VALUE=DATE:20240229
DTSTAMP:20260528T045010
CREATED:20230425T013322Z
LAST-MODIFIED:20230504T065225Z
UID:2258-1677628800-1709164799@ccg.ibs.re.kr
SUMMARY:Insong Choe (최인송\, Konkuk University)
DESCRIPTION:Insong Choe (최인송) \nVisitor (2023.3.1-2024.2.28) from Konkuk University \nOffice: B255
URL:https://ccg.ibs.re.kr/event/230301-240228/
CATEGORIES:Visitors
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230807T140000
DTEND;TZID=Asia/Seoul:20230807T145000
DTSTAMP:20260528T045010
CREATED:20230802T061117Z
LAST-MODIFIED:20230802T061320Z
UID:2425-1691416800-1691419800@ccg.ibs.re.kr
SUMMARY:Minseong Kwon\, Spherical Geometry of Hilbert Schemes of Conics in Adjoint Varieties
DESCRIPTION:    Speaker\n\n\nMinseong Kwon\nKAIST\n\n\n\n\n\n\nFor each rational homogeneous space\, the space of lines is now well-understood and can be described in terms of the induced group action. It is natural to consider rational curves of higher degree\, and in this talk\, we discuss geometry of conics in adjoint varieties\, which are rational homogeneous spaces associated to simple Lie algebras. Each adjoint variety is equipped with a hyperplane distribution called the contact distribution\, and we show that smooth conics transverse to the contact distribution form a homogeneous symmetric variety if the adjoint variety is of Picard number 1. This enables us to view the Hilbert scheme of conics as a spherical variety\, and we compute its colored fan by using the description of the space of lines and the Hilbert-Chow morphism.
URL:https://ccg.ibs.re.kr/event/2023-08-07-1400-1450/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230807T150000
DTEND;TZID=Asia/Seoul:20230807T163000
DTSTAMP:20260528T045010
CREATED:20230720T004336Z
LAST-MODIFIED:20230802T043609Z
UID:2372-1691420400-1691425800@ccg.ibs.re.kr
SUMMARY:Kyeong-Dong Park\, K-stability of Fano Spherical Varieties\, I
DESCRIPTION:    Speaker\n\n\nKyeong-Dong Park\nGyeongsang National University\n\n\n\n\n\n\nThe aim of this seminar is to provide participants with a comprehensive understanding of the paper “K-stability of Fano spherical varieties” by Thibaut Delcroix. For a reductive algebraic group G\, a normal G-variety is called spherical if it contains an open B-orbit\, where B is a fixed Borel subgroup of G. The class of spherical varieties contains several important families which were studied independently\, for example\, toric varieties\, rational homogeneous varieties\, group embeddings\, horospherical varieties\, symmetric varieties\, and wonderful varieties. They are classified by combinatorial objects called colored fans\, which generalize the fans appearing in the classification of toric varieties. We discuss Delcroix’s combinatorial criterion for K-stability of a smooth Fano spherical variety in terms of the barycenter of its moment polytope with respect to the Duistermaat-Heckman measure and data associated to the corresponding spherical homogeneous space. \n(1) Spherical varieties\, colored fans\, and algebraic moment polytopes \n(2) Criterion for K-stability of Fano spherical varieties and its applications \n(3) Equivariant test configurations with horospherical central fiber\, and modified Futaki invariant
URL:https://ccg.ibs.re.kr/event/2023-08-07-1500-1630/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
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