BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Center for Complex Geometry - ECPv6.16.2//NONSGML v1.0//EN
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METHOD:PUBLISH
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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X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Asia/Seoul
BEGIN:STANDARD
TZOFFSETFROM:+0900
TZOFFSETTO:+0900
TZNAME:KST
DTSTART:20210101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;VALUE=DATE:20220815
DTEND;VALUE=DATE:20230815
DTSTAMP:20260529T041819
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:20230104
DTEND;VALUE=DATE:20230107
DTSTAMP:20260529T041819
CREATED:20230105T014437Z
LAST-MODIFIED:20230105T014437Z
UID:1991-1672790400-1673049599@ccg.ibs.re.kr
SUMMARY:Yunhyung Cho (조윤형\, Sungkyunkwan University)
DESCRIPTION:Yunhyung Cho (조윤형) \nVisitor (2023.1.4-2023.1.6) from Sungkyunkwan University\nOffice: –
URL:https://ccg.ibs.re.kr/event/yunhyung-cho-230104-230106/
CATEGORIES:Visitors
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230112T160000
DTEND;TZID=Asia/Seoul:20230112T170000
DTSTAMP:20260529T041819
CREATED:20221228T083141Z
LAST-MODIFIED:20230110T055908Z
UID:1944-1673539200-1673542800@ccg.ibs.re.kr
SUMMARY:JongHae Keum\, Fake Projective Planes I
DESCRIPTION:     Speaker\n\n\nJongHae Keum\nKIAS\n\n\n\n\n\n\nFake projective planes (abbreviated as FPPs) are 2-dimensional complex manifolds with the same Betti numbers as the projective plane\, but not isomorphic to it. \nFPPs can be uniformized by a complex 2-ball. In other words\, they are ball quotients having the minimum possible Betti numbers. \nThe existence of such a surface was first proved by Mumford in 1979\, via 2-adic uniformization. \nNot always algebraic varieties are described via polynomial equations: sometimes they are constructed via uniformization: this means\, as quotients of certain domains in a complex vector space\, called bounded symmetric domains\, via the action of discontinuous groups. Then general theorems (as Kodaira’s) imply the algebraicity of these quotient complex manifolds. The problem concerning the algebro-geometrical properties of such varieties constructed via uniformization and especially the description of their projective embeddings (and the corresponding polynomial equations) lies at the crossroads of several allied fields: the theory of arithmetic groups and division algebras\, complex algebraic and differential geometry\, linear systems\, use of group symmetries\, and topological and homological tools in the study of quotient spaces. Of particular importance are the so-called ball quotients\, especially in dimension 2\, since they yield the surfaces with the maximal possible canonical volume K2 for a fixed value of the geometric genus pg. \nIn the first lecture I will introduce basic properties of FPPs and their position in the classification theory of algebraic surfaces. \nIn the second I will discuss recent progress on them\, such as their derived categories\, bicanonical maps and their equations.
URL:https://ccg.ibs.re.kr/event/2023-01-12/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230113T110000
DTEND;TZID=Asia/Seoul:20230113T120000
DTSTAMP:20260529T041819
CREATED:20221228T083306Z
LAST-MODIFIED:20230110T055934Z
UID:1947-1673607600-1673611200@ccg.ibs.re.kr
SUMMARY:JongHae Keum\, Fake Projective Plane II
DESCRIPTION:     Speaker\n\n\nJongHae Keum\nKIAS\n\n\n\n\n\n\nFake projective planes (abbreviated as FPPs) are 2-dimensional complex manifolds with the same Betti numbers as the projective plane\, but not isomorphic to it. \nFPPs can be uniformized by a complex 2-ball. In other words\, they are ball quotients having the minimum possible Betti numbers. \nThe existence of such a surface was first proved by Mumford in 1979\, via 2-adic uniformization. \nNot always algebraic varieties are described via polynomial equations: sometimes they are constructed via uniformization: this means\, as quotients of certain domains in a complex vector space\, called bounded symmetric domains\, via the action of discontinuous groups. Then general theorems (as Kodaira’s) imply the algebraicity of these quotient complex manifolds. The problem concerning the algebro-geometrical properties of such varieties constructed via uniformization and especially the description of their projective embeddings (and the corresponding polynomial equations) lies at the crossroads of several allied fields: the theory of arithmetic groups and division algebras\, complex algebraic and differential geometry\, linear systems\, use of group symmetries\, and topological and homological tools in the study of quotient spaces. Of particular importance are the so-called ball quotients\, especially in dimension 2\, since they yield the surfaces with the maximal possible canonical volume K2 for a fixed value of the geometric genus pg. \nIn the first lecture I will introduce basic properties of FPPs and their position in the classification theory of algebraic surfaces. \nIn the second I will discuss recent progress on them\, such as their derived categories\, bicanonical maps and their equations.
URL:https://ccg.ibs.re.kr/event/2023-01-13/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230126T160000
DTEND;TZID=Asia/Seoul:20230126T170000
DTSTAMP:20260529T041819
CREATED:20221219T040137Z
LAST-MODIFIED:20221229T014257Z
UID:1914-1674748800-1674752400@ccg.ibs.re.kr
SUMMARY:Kangjin Han\, Secant variety and its singularity I
DESCRIPTION:     Speaker\n\n\nKangjin Han\nDGIST\n\n\n\n\n\n\nSecant variety (or more generally Join) construction is one of the main methods to construct a new geometric object from the original one in classical algebraic geometry. In this series of talks\, we first consider some general facts on secant varieties and then focus on a specific topic\, i.e. singularity of secants. For this purpose\, we review some basic facts and known results in the literature and present some ideas to show (non-)singularity of points in the given secant. We also report a recent work with K. Furukawa on the singular loci of higher secant of Veronese varieties and others. The talks cover such topics as Terracini lemma\, identifiability\, tangential k-contact locus from geometric side and apolar ideal and defining equations via a Young flattening and so on from algebraic side.
URL:https://ccg.ibs.re.kr/event/2023-01-26/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230127T103000
DTEND;TZID=Asia/Seoul:20230127T113000
DTSTAMP:20260529T041819
CREATED:20221219T040333Z
LAST-MODIFIED:20221229T014331Z
UID:1917-1674815400-1674819000@ccg.ibs.re.kr
SUMMARY:Kangjin Han\, Secant variety and its singularity II
DESCRIPTION:     Speaker\n\n\nKangjin Han\nDGIST\n\n\n\n\n\n\nSecant variety (or more generally Join) construction is one of the main methods to construct a new geometric object from the original one in classical algebraic geometry. In this series of talks\, we first consider some general facts on secant varieties and then focus on a specific topic\, i.e. singularity of secants. For this purpose\, we review some basic facts and known results in the literature and present some ideas to show (non-)singularity of points in the given secant. We also report a recent work with K. Furukawa on the singular loci of higher secant of Veronese varieties and others. The talks cover such topics as Terracini lemma\, identifiability\, tangential k-contact locus from geometric side and apolar ideal and defining equations via a Young flattening and so on from algebraic side.
URL:https://ccg.ibs.re.kr/event/2023-01-27/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230130
DTEND;VALUE=DATE:20230209
DTSTAMP:20260529T041819
CREATED:20221130T075502Z
LAST-MODIFIED:20230119T042807Z
UID:1883-1675036800-1675900799@ccg.ibs.re.kr
SUMMARY:Dennis The (University of Tromso\, Norway)
DESCRIPTION:Dennis The \nVisitor (2023.1.30-2023.2.8) from University of Tromso\, Norway  \nOffice: –
URL:https://ccg.ibs.re.kr/event/230130-230208/
CATEGORIES:Visitors
END:VEVENT
END:VCALENDAR