BEGIN:VCALENDAR
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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-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Asia/Seoul
BEGIN:STANDARD
TZOFFSETFROM:+0900
TZOFFSETTO:+0900
TZNAME:KST
DTSTART:20210101T000000
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;VALUE=DATE:20220815
DTEND;VALUE=DATE:20230815
DTSTAMP:20260528T045041
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:20260528T045041
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:20230704T160000
DTEND;TZID=Asia/Seoul:20230704T170000
DTSTAMP:20260528T045041
CREATED:20230620T053922Z
LAST-MODIFIED:20230620T053922Z
UID:2338-1688486400-1688490000@ccg.ibs.re.kr
SUMMARY:Shinnosuke Okawa\, Moduli Space of Semiorthogonal Decompositions
DESCRIPTION:    Speaker\n\n\nShinnosuke Okawa\nOsaka University\n\n\n\n\n\n\nSemiorthogonal decomposition (SOD) is a central notion in the study of triangulated categories. In particular\, SODs of the bounded derived category of coherent sheaves of a variety (SODs of the variety\, for short) have profound relations to its geometry. In this talk I discuss the moduli functor which classifies SODs of the fibers of smooth projective morphisms. The main result is that it is an algebraic space which is locally etale over the target of the morphism. I will explain the main points of the proof\, various applications and open problems. This talk is based on the joint work arXiv:2002.03303 with Andrea Ricolfi and Pieter Belmans.
URL:https://ccg.ibs.re.kr/event/2023-07-04/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230706T110000
DTEND;TZID=Asia/Seoul:20230706T120000
DTSTAMP:20260528T045041
CREATED:20230620T054046Z
LAST-MODIFIED:20230620T054046Z
UID:2340-1688641200-1688644800@ccg.ibs.re.kr
SUMMARY:Shinnosuke Okawa\, Semiorthogonal Decompositions and Relative Canonical Base Locus
DESCRIPTION:    Speaker\n\n\nShinnosuke Okawa\nOsaka University\n\n\n\n\n\n\nMotivated by the DK hypothesis\, some years ago I proved that SODs of the derived category of a smooth projective variety are strongly constrained by the base locus of the canonical linear system. In particular\, this leads to the indecomposability of the derived category of varieties whose canonical bundles are globally generated (hence minimal). In this talk I will briefly recall this work and discuss its generalization to the relative settings. The latter implies new indecomposability results\, including the case of minimal surfaces of positive irregularity. This talk is based on arXiv:2304.14048.
URL:https://ccg.ibs.re.kr/event/2023-07-06/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230711T160000
DTEND;TZID=Asia/Seoul:20230711T170000
DTSTAMP:20260528T045041
CREATED:20230621T041523Z
LAST-MODIFIED:20230621T041523Z
UID:2343-1689091200-1689094800@ccg.ibs.re.kr
SUMMARY:Qifeng Li\, Rigidity of Projective Symmetric Manifolds of Picard Number 1 Associated to Composition Algebras
DESCRIPTION:    Speaker\n\n\nQifeng Li\nShandong University\n\n\n\n\n\n\nTo each complex composition algebra A\, there associates a projective symmetric manifold X(A) of Picard number 1. The vareity X(A) is closed related with Freudenthal’s Magic Square\, which is a square starting from the adjiont varieties of F4\, E6\, E7 and E8. In a recent joint work with Yifei Chen and Baohua Fu\, we obtain the deformation rigidity of X(A). In this talk\, we will introduce the construction of X(A) from Freudenthal’s Magic Square\, the geometric properties of them\, and finally the deformation rigidity of X(A).
URL:https://ccg.ibs.re.kr/event/2023-07-11/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230718T150000
DTEND;TZID=Asia/Seoul:20230718T173000
DTSTAMP:20260528T045041
CREATED:20230615T085143Z
LAST-MODIFIED:20230615T085546Z
UID:2315-1689692400-1689701400@ccg.ibs.re.kr
SUMMARY:Chang-Yeon Chough\, Introduction to algebraic stacks\, I\, II
DESCRIPTION:    Speaker\n\n\nChang-Yeon Chough\nSogang Univ.\n\n\n\n\n\n\nThis is an 8 hours long lecture series on algebraic stacks\, which have become an important part of algebraic geometry (for example\, in the study of moduli spaces) since Deligne and Mumford established the foundation of the theory of stacks. This crash course will be following roughly “Algebraic Spaces and Stacks” by Martin Olsson. Our main goal is to set up a foundation for the theory of algebraic stacks\, so that the attendees would be able to use it in their own research in the future.
URL:https://ccg.ibs.re.kr/event/2023-07-18/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230719T100000
DTEND;TZID=Asia/Seoul:20230719T121500
DTSTAMP:20260528T045041
CREATED:20230615T085304Z
LAST-MODIFIED:20230615T085519Z
UID:2317-1689760800-1689768900@ccg.ibs.re.kr
SUMMARY:Chang-Yeon Chough\, Introduction to algebraic stacks\, III\, IV
DESCRIPTION:    Speaker\n\n\nChang-Yeon Chough\nSogang Univ.\n\n\n\n\n\n\nThis is an 8 hours long lecture series on algebraic stacks\, which have become an important part of algebraic geometry (for example\, in the study of moduli spaces) since Deligne and Mumford established the foundation of the theory of stacks. This crash course will be following roughly “Algebraic Spaces and Stacks” by Martin Olsson. Our main goal is to set up a foundation for the theory of algebraic stacks\, so that the attendees would be able to use it in their own research in the future.
URL:https://ccg.ibs.re.kr/event/2023-07-19/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230720T110000
DTEND;TZID=Asia/Seoul:20230720T120000
DTSTAMP:20260528T045041
CREATED:20230712T130908Z
LAST-MODIFIED:20230716T052735Z
UID:2354-1689850800-1689854400@ccg.ibs.re.kr
SUMMARY:Patrick Brosnan\, How Markman Saves the Hodge Conjecture (for Weil Type Abelian Fourfolds) from Kontsevich\, I
DESCRIPTION:    Speaker\n\n\nPatrick Brosnan\nUniversity of Maryland\n\n\n\n\n\n\nI’ll explain what I know about two very interesting pieces of work: \n(1) Markman’s proof of the Hodge conjecture for Weil type abelian fourfolds of discriminant 1. \n(2) Kontsevich’s tropical approach to looking for counterexamples to the Hodge conjecture for Weil type abelian varieties. \nThen I’ll explain a simple observation of mine\, which implies that Kontsevich’s approach cannot work for abelian fourfolds of any discriminant. \nI’ll start out by explaining the statement of (1) precisely along with the geometric input that is required in (2). Then I’ll formulate my observation\, which is really about why the discriminant determines what types of degenerations an abelian fourfold of Weil type can have. Along the way\, I’ll take the opportunity to say a little bit about Markman’s proof of (1).
URL:https://ccg.ibs.re.kr/event/2023-07-20/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230725T110000
DTEND;TZID=Asia/Seoul:20230725T120000
DTSTAMP:20260528T045041
CREATED:20230712T131020Z
LAST-MODIFIED:20230716T052748Z
UID:2356-1690282800-1690286400@ccg.ibs.re.kr
SUMMARY:Patrick Brosnan\, How Markman Saves the Hodge Conjecture (for Weil Type Abelian Fourfolds) from Kontsevich\, II
DESCRIPTION:    Speaker\n\n\nPatrick Brosnan\nUniversity of Maryland\n\n\n\n\n\n\nI’ll explain what I know about two very interesting pieces of work: \n(1) Markman’s proof of the Hodge conjecture for Weil type abelian fourfolds of discriminant 1. \n(2) Kontsevich’s tropical approach to looking for counterexamples to the Hodge conjecture for Weil type abelian varieties. \nThen I’ll explain a simple observation of mine\, which implies that Kontsevich’s approach cannot work for abelian fourfolds of any discriminant. \nI’ll start out by explaining the statement of (1) precisely along with the geometric input that is required in (2). Then I’ll formulate my observation\, which is really about why the discriminant determines what types of degenerations an abelian fourfold of Weil type can have. Along the way\, I’ll take the opportunity to say a little bit about Markman’s proof of (1).
URL:https://ccg.ibs.re.kr/event/2023-07-25-1100-1200/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230725T150000
DTEND;TZID=Asia/Seoul:20230725T173000
DTSTAMP:20260528T045041
CREATED:20230615T085406Z
LAST-MODIFIED:20230712T131050Z
UID:2319-1690297200-1690306200@ccg.ibs.re.kr
SUMMARY:Chang-Yeon Chough\, Introduction to algebraic stacks\, V\, VI
DESCRIPTION:    Speaker\n\n\nChang-Yeon Chough\nSogang Univ.\n\n\n\n\n\n\nThis is an 8 hours long lecture series on algebraic stacks\, which have become an important part of algebraic geometry (for example\, in the study of moduli spaces) since Deligne and Mumford established the foundation of the theory of stacks. This crash course will be following roughly “Algebraic Spaces and Stacks” by Martin Olsson. Our main goal is to set up a foundation for the theory of algebraic stacks\, so that the attendees would be able to use it in their own research in the future.
URL:https://ccg.ibs.re.kr/event/2023-07-25-1500-1730/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230726T100000
DTEND;TZID=Asia/Seoul:20230726T121500
DTSTAMP:20260528T045041
CREATED:20230615T085501Z
LAST-MODIFIED:20230615T085501Z
UID:2321-1690365600-1690373700@ccg.ibs.re.kr
SUMMARY:Chang-Yeon Chough\, Introduction to algebraic stacks\, VII\, VIII
DESCRIPTION:    Speaker\n\n\nChang-Yeon Chough\nSogang Univ.\n\n\n\n\n\n\nThis is an 8 hours long lecture series on algebraic stacks\, which have become an important part of algebraic geometry (for example\, in the study of moduli spaces) since Deligne and Mumford established the foundation of the theory of stacks. This crash course will be following roughly “Algebraic Spaces and Stacks” by Martin Olsson. Our main goal is to set up a foundation for the theory of algebraic stacks\, so that the attendees would be able to use it in their own research in the future.
URL:https://ccg.ibs.re.kr/event/2023-07-26/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
END:VCALENDAR