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PRODID:-//Center for Complex Geometry - ECPv6.15.20//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:20230101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240611T160000
DTEND;TZID=Asia/Seoul:20240611T170000
DTSTAMP:20260416T073708
CREATED:20240425T082421Z
LAST-MODIFIED:20240529T003804Z
UID:3117-1718121600-1718125200@ccg.ibs.re.kr
SUMMARY:Eric Sommers\, Some Slodowy Slices Associated to Special Nilpotent Orbits
DESCRIPTION:    Speaker\n\n\nEric Sommers\nUniversity of Massachusetts\n\n\n\n\n\n\nAmong the nilpotent orbits in a simple Lie algebra are the special nilpotent orbits\, which play an important role in representation theory. Some of the geometry of the closure of a nilpotent orbit can be understood by taking a transverse slice to a smaller orbit in the closure. This talk concerns a classification of two types of such transverse slices: (1) those between adjacent special nilpotent orbits; and (2) those between a special nilpotent orbit and a certain non-special nilpotent orbit in its closure. The slices in part (1) exhibit a duality\, which extends an observation of Kraft and Procesi for type A. The slices in part (2) are related to a conjecture of Lusztig on special pieces.  This talk is based on two preprints with Baohua Fu\, Daniel Juteau\, and Paul Levy.
URL:https://ccg.ibs.re.kr/event/2024-0611-1600-1700/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240611T110000
DTEND;TZID=Asia/Seoul:20240611T120000
DTSTAMP:20260416T073708
CREATED:20240410T120654Z
LAST-MODIFIED:20240610T000002Z
UID:3061-1718103600-1718107200@ccg.ibs.re.kr
SUMMARY:Minyoung Jeon\, Prym-Brill-Noether Loci and Prym-Petri Theorem
DESCRIPTION:Zoom ID: 880 6763 5837\nPW: 312515 \n\n\n    Speaker\n\n\nMinyoung Jeon\nUniversity of Georgia\n\n\n\n\n\n\nPrym varieties are abelian varieties constructed from etale double covers of algebraic curves. In 1985\, Welters equipped Prym varieties with Brill-Noether loci. In this talk\, we will describe the Prym-Brill-Noether loci with special vanishing at up to two marked points and will then give K-classes of the pointed and two-pointed Prym-Brill-Noether locus. As applications of the K-class formulas of the Prym-Brill-Noether loci\, we will also provide formulas for Euler characteristics of the pointed Prym-Brill-Noether loci and coupled Prym-Petri theorem.
URL:https://ccg.ibs.re.kr/event/2024-0611-1100-1200/
LOCATION:on-line
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240523T110000
DTEND;TZID=Asia/Seoul:20240523T120000
DTSTAMP:20260416T073708
CREATED:20240229T044631Z
LAST-MODIFIED:20240508T084936Z
UID:2973-1716462000-1716465600@ccg.ibs.re.kr
SUMMARY:Sung Rak Choi\, Adjoint Asymptotic Multiplier Ideal Sheaves
DESCRIPTION:    Speaker\n\n\nSung Rak Choi\nYonsei University\n\n\n\n\n\n\nIn this talk\, we define and study a triple called a potential triple which consists of a pair (X\, Δ) and a polarizing pseudoeffective divisor D. \nTo such a triple\, we define a so-called potential multiplier ideal sheaf which gives a simultaneous generalization of the multiplier ideal sheaf and asymptotic multiplier ideal sheaf. We give a description of the closed subset defined by potential multiplier ideal sheaf in terms of the minimal model program. We also characterize the case where potential multiplier ideal sheaf is trivial. Lastly\, we also prove a Nadel type vanishing theorem of cohomology for potential multiplier ideal sheaf. We further present applications of the theory of potential triples. This is a joint work with S.Jang and D.Kim.
URL:https://ccg.ibs.re.kr/event/2024-0523/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240522T160000
DTEND;TZID=Asia/Seoul:20240522T170000
DTSTAMP:20260416T073708
CREATED:20240410T120510Z
LAST-MODIFIED:20240513T070853Z
UID:3059-1716393600-1716397200@ccg.ibs.re.kr
SUMMARY:Shigeru Mukai\, Moduli of Abelian Surfaces\, Polyhedral Groups and Fano 3-folds of Degree 22 (Part 2)
DESCRIPTION:    Speaker\n\n\nShigeru Mukai\nRIMS\, Kyoto University\n\n\n\n\n\n\nI will discuss the moduli space of abelian surfaces with bi-level structure of type (1\, d) for d = 2\, 3\, 4\, 5. \nPart 1: Their Satake compactification is the projective 3-space P3 for d = 2\, 3\, 4. \nPart 2: It is a small contraction of the blow-up of P3 at 60 points for d = 5. I give two proofs. One is analytic and uses good automorphic forms constructed by Gritsenko-Nilulin. The other is algebraic and uses U22\, one of the Umemura 3-folds\, and Reye congruences.
URL:https://ccg.ibs.re.kr/event/2024-0522/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240521T160000
DTEND;TZID=Asia/Seoul:20240521T170000
DTSTAMP:20260416T073708
CREATED:20240410T120353Z
LAST-MODIFIED:20240507T000023Z
UID:3057-1716307200-1716310800@ccg.ibs.re.kr
SUMMARY:Shigeru Mukai\, Moduli of Abelian Surfaces\, Polyhedral Groups and Fano 3-folds of Degree 22 (Part 1)
DESCRIPTION:    Speaker\n\n\nShigeru Mukai\nRIMS\, Kyoto University\n\n\n\n\n\n\nI will discuss the moduli space of abelian surfaces with bi-level structure of type (1\, d) for d = 2\, 3\, 4\, 5. \nPart 1: Their Satake compactification is the projective 3-space P3 for d = 2\, 3\, 4. \nPart 2: It is a small contraction of the blow-up of P3 at 60 points for d = 5. I give two proofs. One is analytic and uses good automorphic forms constructed by Gritsenko-Nilulin. The other is algebraic and uses U22\, one of the Umemura 3-folds\, and Reye congruences.
URL:https://ccg.ibs.re.kr/event/2024-0521/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240517T160000
DTEND;TZID=Asia/Seoul:20240517T170000
DTSTAMP:20260416T073708
CREATED:20240308T031917Z
LAST-MODIFIED:20240422T004620Z
UID:3014-1715961600-1715965200@ccg.ibs.re.kr
SUMMARY:Jungkai Chen\, Threefold Divisorial Contraction to Curves
DESCRIPTION:    Speaker\n\n\nJungkai Chen\nNational Taiwan University\n\n\n\n\n\n\nThe minimal model program works pretty well in dimension three. However\, the explicit classification of divisorial contractions to points was completed quite recently thanks to the work of Kawamata\, Hayakawa\, Kawakita and more. In this talk\, we are going to describe threefold divisorial contractions to curves. We will demonstrate some more possible higher dimensional extensions. This is joint work in progress with Jheng-Jie Chen and Hsin-Ku Chen.
URL:https://ccg.ibs.re.kr/event/2024-0517/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240514
DTEND;VALUE=DATE:20240517
DTSTAMP:20260416T073708
CREATED:20240305T011448Z
LAST-MODIFIED:20240517T022906Z
UID:2985-1715644800-1715903999@ccg.ibs.re.kr
SUMMARY:Workshop on Algebraic Geometry in Busan
DESCRIPTION:Speakers\nLorenzo Barban (IBS-CCG)\nJungkai Chen (National Taiwan University)\nToshiyuki Katsura (University of Tokyo)\nShigeyuki Kondo (Nagoya University)\nChing-Jui Lai (National Cheung Kung University)\nDonggun Lee (IBS-CCG)\nHsueh-Yung Lin (National Taiwan University)\nShigeru Mukai (Kyoto University)\nKeiji Oguiso (University of Tokyo) \nAbstracts\nPDF file \nSchedule\nMay 14 (Tuesday) \n14:00~14:20 Registration\n14:20~15:20 Oguiso\n15:40~16:40 Lai\n17:00~18:00 Lin\n18:30~20:30 Dinner \nMay 15 (Wednesday) \n09:30~10:30 Katsura\n11:00~12:00 Kondo\n12:00~13:30 Lunch\n13:30~17:30 Discussion\n18:00~20:00 Banquet \nMay 16 (Thursday) \n09:30~10:30 Chen\n11:00~12:00 Barban\n12:00~13:30 Lunch\n13:30~14:30 Lee\n15:00~16:00 Mukai \nOrganizers\nJongHae Keum (KIAS)\nYongnam Lee (IBS-CCG/KAIST) \nVenue\nLa Valse Hotel\, Busan \n* Due to available hotel rooms and budgets\, participation is by invitation only. If you are interested to participate in this workshop\, please contact one of the organizers by April 15.
URL:https://ccg.ibs.re.kr/event/2024-0514-0516/
LOCATION:La Valse Hotel\, Busan\, Korea\, Republic of
CATEGORIES:Conferences and Workshops
ATTACH;FMTTYPE=image/jpeg:https://ccg.ibs.re.kr/wp-content/uploads/2024/05/IMG_6536-scaled.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240513T160000
DTEND;TZID=Asia/Seoul:20240513T170000
DTSTAMP:20260416T073708
CREATED:20240308T031735Z
LAST-MODIFIED:20240420T084747Z
UID:3011-1715616000-1715619600@ccg.ibs.re.kr
SUMMARY:Ching-Jui Lai\, Anticanonical Volume of Singular Fano Threefolds
DESCRIPTION:    Speaker\n\n\nChing-Jui Lai\nNational Cheung Kung University\n\n\n\n\n\n\nThe set of canonical Fano threefolds form a bounded family by results of Kawamata\, Mori-Miyaoka-Kollar-Tagaki\, and in a much more general setting by Birkar. In particular\, the anticaonical volume –KX3 is bounded. An optimal lower bound is 1/330 by the work of Chen-Chen. In this talk\, we discuss the problem of identifying an optimal upper bound of –KX3.
URL:https://ccg.ibs.re.kr/event/2024-0513-1600-1700/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240513T143000
DTEND;TZID=Asia/Seoul:20240513T153000
DTSTAMP:20260416T073708
CREATED:20240308T031601Z
LAST-MODIFIED:20240422T004325Z
UID:3009-1715610600-1715614200@ccg.ibs.re.kr
SUMMARY:Hsueh-Yung Lin\, Motivic Invariants of Birational Automorphisms of Threefolds
DESCRIPTION:    Speaker\n\n\nHsueh-Yung Lin\nNational Taiwan University\n\n\n\n\n\n\nThe motivic invariant c(f) of a birational automorphism f : X – → X measures the difference between the birational types of the exceptional divisors of f and those of the inverse f-1. In general c(f) is nonzero: this is the case when f is some Cremona transformation\, which leads to new explanation as to why Cremona groups are not simple. In the other direction\, which will be the main focus of the talk\, we show that the invariant c(f) always vanishes when X is a complex projective threefold. (joint work in progress with E. Shinder.)
URL:https://ccg.ibs.re.kr/event/2024-0513-1430-1530/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240508T110000
DTEND;TZID=Asia/Seoul:20240508T120000
DTSTAMP:20260416T073708
CREATED:20240308T031423Z
LAST-MODIFIED:20240308T031423Z
UID:3006-1715166000-1715169600@ccg.ibs.re.kr
SUMMARY:Shigeyuki Kondo\, A Review on Enriques Surfaces: Moduli\, Automorphism Groups and Positive Characteristics\, II
DESCRIPTION:    Speaker\n\n\nShigeyuki Kondo\nNagoya University\n\n\n\n\n\n\nThe Enriques surface was discovered\, in 1894 by Federigo Enriques\, as a counter-example of a rationality problem.\nFirst I would like to recall the moduli space and the automorphism groups of Enriques surfaces over the complex numbers.\nIn the later half\, I shall mention a recent progress in positive characteristic\, especially in characteristic two.
URL:https://ccg.ibs.re.kr/event/2024-0508/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240507T160000
DTEND;TZID=Asia/Seoul:20240507T170000
DTSTAMP:20260416T073708
CREATED:20240308T031240Z
LAST-MODIFIED:20240308T031240Z
UID:3004-1715097600-1715101200@ccg.ibs.re.kr
SUMMARY:Shigeyuki Kondo\, A Review on Enriques Surfaces: Moduli\, Automorphism Groups and Positive Characteristics\, I
DESCRIPTION:    Speaker\n\n\nShigeyuki Kondo\nNagoya University\n\n\n\n\n\n\nThe Enriques surface was discovered\, in 1894 by Federigo Enriques\, as a counter-example of a rationality problem.\nFirst I would like to recall the moduli space and the automorphism groups of Enriques surfaces over the complex numbers.\nIn the later half\, I shall mention a recent progress in positive characteristic\, especially in characteristic two.
URL:https://ccg.ibs.re.kr/event/2024-0507/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240430T160000
DTEND;TZID=Asia/Seoul:20240430T170000
DTSTAMP:20260416T073708
CREATED:20240325T121305Z
LAST-MODIFIED:20240325T121305Z
UID:3053-1714492800-1714496400@ccg.ibs.re.kr
SUMMARY:Benjamin Bakker\, A Proof of Matsushita's Conjecture
DESCRIPTION:    Speaker\n\n\nBenjamin Bakker\nUniv. Illinois Chicago\n\n\n\n\n\n\nMatsushita conjectured that for any Lagrangian fibration f:X→B of a compact hyperkahler manifold X\, the fibers deform either maximally or trivially in moduli. In this talk I’ll explain how to prove this conjecture via Hodge theory. I will also discuss some other features of the topology of Lagrangian fibrations and a result about the density of torsion points in sections. Time permitting\, I will discuss some more recent work with C. Schnell from this perspective reproving a result of J.-M. Hwang that B is projective space if it is smooth.
URL:https://ccg.ibs.re.kr/event/2024-0430/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240429T160000
DTEND;TZID=Asia/Seoul:20240429T170000
DTSTAMP:20260416T073708
CREATED:20240325T120910Z
LAST-MODIFIED:20240325T120910Z
UID:3050-1714406400-1714410000@ccg.ibs.re.kr
SUMMARY:Benjamin Bakker\, Hodge Theory and Lagrangian Fibrations
DESCRIPTION:    Speaker\n\n\nBenjamin Bakker\nUniv. Illinois Chicago\n\n\n\n\n\n\nCompact hyperkahler manifolds X are higher-dimensional generalizations of K3 surfaces; their geometry is tightly constrained by the existence of a holomorphic symplectic form. For example\, a result of Matsushita says the only nontrivial fibration structures f:X→B they admit are fibrations by Lagrangian tori. In this talk\, I will give an overview of how Hodge theory connects the geometry of B to the variation of these tori in moduli\, and how Hodge-theoretic techniques can be used to understand B both locally and globally.
URL:https://ccg.ibs.re.kr/event/2024-0429/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240426T110000
DTEND;TZID=Asia/Seoul:20240426T120000
DTSTAMP:20260416T073708
CREATED:20240229T044508Z
LAST-MODIFIED:20240311T002552Z
UID:2971-1714129200-1714132800@ccg.ibs.re.kr
SUMMARY:Chuyu Zhou\, Wall Crossing for K-stability
DESCRIPTION:    Speaker\n\n\nChuyu Zhou\nYonsei University\n\n\n\n\n\n\nWe will introduce a novel characteristic of K-stability\, i.e. wall crossing phenomenon\, and present a comparison between K-stability and GIT-stability. Time permitting\, we will survey some open problems.
URL:https://ccg.ibs.re.kr/event/2024-0426/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240425T110000
DTEND;TZID=Asia/Seoul:20240425T120000
DTSTAMP:20260416T073708
CREATED:20240229T044415Z
LAST-MODIFIED:20240311T002511Z
UID:2969-1714042800-1714046400@ccg.ibs.re.kr
SUMMARY:Chuyu Zhou\, Moduli for Fano Varieties with K-stability
DESCRIPTION:    Speaker\n\n\nChuyu Zhou\nYonsei University\n\n\n\n\n\n\nWe will present the construction of moduli space of Fano varieties with K-stability\, including defining the moduli functor\, showing various good properties of the functor\, and introducing Alper-Halpern Leistner-Heinloth criterion for the existence of good moduli space.
URL:https://ccg.ibs.re.kr/event/2024-0425/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240424T110000
DTEND;TZID=Asia/Seoul:20240424T120000
DTSTAMP:20260416T073708
CREATED:20240229T044246Z
LAST-MODIFIED:20240311T002339Z
UID:2966-1713956400-1713960000@ccg.ibs.re.kr
SUMMARY:Chuyu Zhou\, K-stability of Fano Varieties - Various Viewpoints
DESCRIPTION:    Speaker\n\n\nChuyu Zhou\nYonsei University\n\n\n\n\n\n\nWe will present various criterion for K-stability for Fano varieties\, including viewpoints from test configurations\, valuations\, and filtrations.
URL:https://ccg.ibs.re.kr/event/2024-0424/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240423T140000
DTEND;TZID=Asia/Seoul:20240423T150000
DTSTAMP:20260416T073708
CREATED:20240229T044128Z
LAST-MODIFIED:20240411T030725Z
UID:2964-1713880800-1713884400@ccg.ibs.re.kr
SUMMARY:In-Kyun Kim\, Wall-crossing of K-moduli Spaces of Weighted Projective Spaces
DESCRIPTION:    Speaker\n\n\nIn-Kyun Kim\nKIAS\n\n\n\n\n\n\nIn algebraic geometry\, constructing moduli spaces that parametrize families of algebraic varieties with certain properties is an important problem.  \nIn the case of Fano varieties\, the construction of moduli spaces is a challenging problem.  \nK-stability provides a criterion for selecting nice representatives within the moduli space\, which helps create more meaningful and well-behaved moduli spaces.  \nIn this talk\, we will study some properties of K-moduli spaces. This is a joint work with Yuchen Liu and Chengxi Wang.
URL:https://ccg.ibs.re.kr/event/2024-0423/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240415
DTEND;VALUE=DATE:20240419
DTSTAMP:20260416T073708
CREATED:20240105T035350Z
LAST-MODIFIED:20240417T043737Z
UID:2862-1713139200-1713484799@ccg.ibs.re.kr
SUMMARY:Workshop on Geometry of Homogeneous Varieties
DESCRIPTION:Speakers\nMichel Brion (U. Grenoble)\nJarek Buczynski (IMPAN\, Warsaw)\nThibaut Delcroix (U. Montpellier)\nMinseong Kwon (KAIST/IBS-CCG)\nQifeng Li (Shandong U.)\nYoshinori Namikawa (RIMS\, Kyoto)\nKyeong-Dong Park (Gyeongsang National U.)\nBoris Pasquier (U. Poitiers)\nLéa Villeneuve (U. Poitiers) \nAbstracts\nPDF file \nSchedule\nApril 15 (Monday) \n10:00-11:00 Brion\n11:20-12:20 Brion\n12:30-13:20 Lunch\n15:00-16:00 Kwon\n16:20-17:40 Li \nApril 16 (Tuesday) \n10:00-11:00 Pasquier\n11:20-12:20 Pasquier\n12:30-13:20 Lunch\n15:00-16:00 Park\n16:20-17:40 Villeneuve \nApril 17 (Wednesday) \n10:00-11:00 Namikawa\n11:20-12:20 Namikawa\n12:30-13:20 Lunch\nFree Afternoon \nApril 18 (Thursday) \n10:00-11:00 Delcroix\n11:20-12:20 Delcroix\n12:30-13:20 Lunch\n15:00-16:00 Buczynski\n16:20-17:20 Buczynski \nOrganizers\nJaehyun Hong (IBS-CCG)\nJun-Muk Hwang (IBS-CCG) \nMain Hotel\nLotte City Hotel Daejeon (4-30 Doryong-dong\, Yuseong-gu\, Daejeon) \nVenue\nB109\, IBS\, Daejeon\, Korea \nRegistration\nPlease submit Google form by March 31. \nMore Information\n• How to get to IBS-CCG
URL:https://ccg.ibs.re.kr/event/2024-04-15-18/
LOCATION:B109\, IBS\, Korea\, Republic of
CATEGORIES:Conferences and Workshops
ATTACH;FMTTYPE=image/jpeg:https://ccg.ibs.re.kr/wp-content/uploads/2024/04/2024-Workshop-on-Geometry-of-Homogeneous-Varieties_Group-photo1-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240411T160000
DTEND;TZID=Asia/Seoul:20240411T170000
DTSTAMP:20260416T073708
CREATED:20240229T055639Z
LAST-MODIFIED:20240229T055639Z
UID:2978-1712851200-1712854800@ccg.ibs.re.kr
SUMMARY:Michel Brion\, Introduction to Complete Symmetric Varieties
DESCRIPTION:    Speaker\n\n\nMichel Brion\nU. Grenoble\n\n\n\n\n\n\nThis is an introductory lecture on compactifications of symmetric spaces in algebraic geometry.
URL:https://ccg.ibs.re.kr/event/2024-0411/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240409T160000
DTEND;TZID=Asia/Seoul:20240409T170000
DTSTAMP:20260416T073708
CREATED:20240229T055532Z
LAST-MODIFIED:20240229T055532Z
UID:2976-1712678400-1712682000@ccg.ibs.re.kr
SUMMARY:Michel Brion\, Introduction to Symmetric Spaces
DESCRIPTION:    Speaker\n\n\nMichel Brion\nU. Grenoble\n\n\n\n\n\n\nThis is an introductory lecture on symmetric spaces in algebraic geometry.
URL:https://ccg.ibs.re.kr/event/2024-0409/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240326T160000
DTEND;TZID=Asia/Seoul:20240326T170000
DTSTAMP:20260416T073708
CREATED:20240215T131230Z
LAST-MODIFIED:20240215T131230Z
UID:2948-1711468800-1711472400@ccg.ibs.re.kr
SUMMARY:Yong Hu\, Noether Inequality for Irregular Threefolds of General Type
DESCRIPTION:    Speaker\n\n\nYong Hu\nShanghai Jiao Tong University\n\n\n\n\n\n\nLet X be a smooth irregular 3-fold of general type. In this talk\, we will prove that the optimal Noether inequality vol(X) ≥ (4/3) pg(X) holds if pg(X) ≥ 16 or if X has a Gorenstein minimal model. Moreover\, when X attains the equality and pg(X) ≥ 16\, its canonical model will be explicitly described. This is a joint work with Tong Zhang.
URL:https://ccg.ibs.re.kr/event/2024-0326/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240321T160000
DTEND;TZID=Asia/Seoul:20240321T170000
DTSTAMP:20260416T073708
CREATED:20240214T055456Z
LAST-MODIFIED:20240226T054513Z
UID:2942-1711036800-1711040400@ccg.ibs.re.kr
SUMMARY:Dennis The\, On 4D Split-conformal Structures with G2-symmetric Twistor Distribution
DESCRIPTION:    Speaker\n\n\nDennis The\nThe Artic University of Norway\, Tromso\n\n\n\n\n\n\nIn their 2013 article\, An & Nurowski considered two surfaces rolling on each other without twisting or slipping\, and defined a twistor distribution (on the space of all real totally null self-dual 2-planes) for the associated 4D split-signature conformal structure. If this split-conformal structure is not anti-self dual\, then the twistor distribution is a (2\,3\,5)-distribution\, and An-Nurowski identified interesting rolling examples where it achieves maximal\, i.e. G2\, symmetry. Relaxing the rolling assumption\, a similar construction can be made for any 4D split-conformal structure\, and my talk will discuss a broader classification of examples where such exceptional symmetry for the twistor distribution is achieved. (Joint work with Pawel Nurowski & Katja Sagerschnig.)
URL:https://ccg.ibs.re.kr/event/2024-0321/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240319T160000
DTEND;TZID=Asia/Seoul:20240319T170000
DTSTAMP:20260416T073708
CREATED:20240214T055224Z
LAST-MODIFIED:20240226T054451Z
UID:2940-1710864000-1710867600@ccg.ibs.re.kr
SUMMARY:Boris Doubrov\, Bifiltered Parabolic Geometries
DESCRIPTION:    Speaker\n\n\nBoris Doubrov\nBelarusian State University\, Minsk\n\n\n\n\n\n\nWe introduce the notion of a bifiltered manifold and generalizing the constructions of the symbol and Tanaka prolongation from nilpotent differential geometry. Next\, we consider bifiltered manifolds modeled by bigradings of simple Lie algebras and show how this generalizes known constructions in the parabolic geometries such as existence of a unique normal Cartan connection. Finally\, we show how the language of bifiltered manifolds can be used for uniform treatment of correspondence spaces in parabolic geometries\, where the covering space is not necessarily regular in the classical sense.
URL:https://ccg.ibs.re.kr/event/2024-0319/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240314T153000
DTEND;TZID=Asia/Seoul:20240314T163000
DTSTAMP:20260416T073708
CREATED:20240305T053241Z
LAST-MODIFIED:20240305T053241Z
UID:2995-1710430200-1710433800@ccg.ibs.re.kr
SUMMARY:Gebhard Martin\, Automorphisms of del Pezzo Surfaces III
DESCRIPTION:    Speaker\n\n\nGebhard Martin\nUniversität Bonn\n\n\n\n\n\n\nMotivated by the classification of finite subgroups of the Cremona group of the plane\, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular\, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del Pezzo surfaces and on joint work with Claudia Stadlmayr on the classification of vector fields on mildly singular del Pezzo surfaces. Special emphasis will be placed on the theory of actions of infinitesimal group schemes and characteristic-free methods in classical algebraic geometry.
URL:https://ccg.ibs.re.kr/event/2024-0314/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240312T160000
DTEND;TZID=Asia/Seoul:20240312T170000
DTSTAMP:20260416T073708
CREATED:20240305T053102Z
LAST-MODIFIED:20240305T053319Z
UID:2992-1710259200-1710262800@ccg.ibs.re.kr
SUMMARY:Gebhard Martin\, Automorphisms of del Pezzo Surfaces II
DESCRIPTION:    Speaker\n\n\nGebhard Martin\nUniversität Bonn\n\n\n\n\n\n\nMotivated by the classification of finite subgroups of the Cremona group of the plane\, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular\, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del Pezzo surfaces and on joint work with Claudia Stadlmayr on the classification of vector fields on mildly singular del Pezzo surfaces. Special emphasis will be placed on the theory of actions of infinitesimal group schemes and characteristic-free methods in classical algebraic geometry.
URL:https://ccg.ibs.re.kr/event/2024-0312/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240307T153000
DTEND;TZID=Asia/Seoul:20240307T163000
DTSTAMP:20260416T073708
CREATED:20240305T053732Z
LAST-MODIFIED:20240305T053838Z
UID:2998-1709825400-1709829000@ccg.ibs.re.kr
SUMMARY:Claudia Stadlmayr\, Which Rational Double Points Occur on del Pezzo Surfaces?
DESCRIPTION:    Speaker\n\n\nClaudia Stadlmayr\nTechnische Universität München\n\n\n\n\n\n\nCanonical surface singularities\, also called rational double points (RDPs)\, can be classified according to their dual resolution graphs\, which are Dynkin diagrams of types A\, D\, and E. Whereas in characteristic different from 2\, 3\, and 5\, rational double points are “taut”\, that is\, they are uniquely determined by their dual resolution graph\, this is not necessarily the case in small characteristics. To such non-taut RDPs Artin assigned a coindex distinguishing the ones with the same resolution graph in terms of their deformation theory. In 1934\, Du Val determined all configurations of rational double points that can appear on complex RDP del Pezzo surfaces. In order to extend Du Val’s work to positive characteristic\, one has to determine the Artin coindices to distinguish the non-taut rational double points that occur. In this talk\, I will explain how to answer the question “Which rational double points (and configurations of them) occur on del Pezzo surfaces?” for all RDP del Pezzo surfaces in all characteristics. This will be done by first reducing the problem to degree 1 and then exploiting the connection to (Weierstraß models of) rational (quasi-)elliptic surfaces.
URL:https://ccg.ibs.re.kr/event/2024-0307/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240305T110000
DTEND;TZID=Asia/Seoul:20240305T120000
DTSTAMP:20260416T073708
CREATED:20240305T052956Z
LAST-MODIFIED:20240305T052956Z
UID:2990-1709636400-1709640000@ccg.ibs.re.kr
SUMMARY:Gebhard Martin\, Automorphisms of del Pezzo Surfaces I
DESCRIPTION:    Speaker\n\n\nGebhard Martin\nUniversität Bonn\n\n\n\n\n\n\nMotivated by the classification of finite subgroups of the Cremona group of the plane\, I will survey old and new results on automorphism groups of del Pezzo surfaces. In particular\, I will report on joint work with Igor Dolgachev on the classification of automorphism groups of smooth del Pezzo surfaces and on joint work with Claudia Stadlmayr on the classification of vector fields on mildly singular del Pezzo surfaces. Special emphasis will be placed on the theory of actions of infinitesimal group schemes and characteristic-free methods in classical algebraic geometry.
URL:https://ccg.ibs.re.kr/event/2024-0305/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240221
DTEND;VALUE=DATE:20240301
DTSTAMP:20260416T073708
CREATED:20230816T045622Z
LAST-MODIFIED:20240304T114415Z
UID:2486-1708473600-1709251199@ccg.ibs.re.kr
SUMMARY:School and Workshop on Moduli\, K-trivial Varieties\, and Related Topics
DESCRIPTION:Speakers for Mini-courses (Feb 21~23)\nHarold Blum (University of Utah)\nRadu Laza (Stony Brook University)\nColleen Robles (Duke University) \nSpeakers for Workshop (Feb 21~23\, and 26-29)\nKenneth Ascher (UC Irvine)\nPhilip Engel (Univ. of Bonn)\nLaure Flapan (Michigan State University)\nYoon-Joo Kim (Columbia University)\nKyoung-Seog Lee (POSTECH)\nZhiyuan Li (SCMS\, Fudan University)\nYuchen Liu (Northwestern University)\nEyal Markman (University of Massachusetts)\nMirko Mauri (École Polytechnique)\nEnrica Mazzon (University of Regensburg)\nYuji Odaka (Kyoto University)\nKieran O’Grady (University of Rome\, La Sapienza)\nKeiji Oguiso (University of Tokyo)\nGianluca Pacienza (University of Lorraine)\nColleen Robles (Duke University)\nJustin Sawon (University of North Carolina)\nQizheng Yin (BICMR\, Peking University) \nAbstracts\n• School \n• Workshop \nSchedule (School and Workshop)\n* Additional talk (online) by Caucher Birkar (Tsinghua U.) at 17:00-18:00 in February 20 (Tue)\n(Zoom ID and PW can be found here.) \nFebruary 21 (Wednesday) \n\n\n\n09:30~10:00\nRegistration\n\n\n10:00~11:00\nRadu Laza\, Lect I\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nColleen Robles\, Lect I\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nHarold Blum\, Lect I\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nKeiji Oguiso\n\n\n17:30~19:30\nDinner (for speakers)\n\n\n\n  \nFebruary 22 (Thursday) \n\n\n\n10:00~11:00\nRadu Laza\, Lect II\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nColleen Robles\, Lect II\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nHarold Blum\, Lect II\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nYuji Odaka\n\n\n17:30~19:30\nBanquet\n\n\n\n  \nFebruary 23 (Friday) \n\n\n\n10:00~11:00\nRadu Laza\, Lect III\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nColleen Robles\, Lect III\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nHarold Blum\, Lect III\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nKyeong-Seog Lee\n\n\n18:00~20:00\nDinner (for speakers)\n\n\n\n  \nFebruary 26 (Monday) \n\n\n\n9:30~10:00\nRegistration\n\n\n10:00~11:00\nKieran O’Grady\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nPhilip Engel\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nEnrica Mazzon\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nYoon-Joo Kim\n\n\n17:30~19:30\nDinner (for speakers)\n\n\n\n  \nFebruary 27 (Tuesday) \n\n\n\n10:00~11:00\nGianluca Pacienza\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nLaure Flapan\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nKenneth Ascher\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nYuchen Liu\n\n\n\n  \nFebruary 28 (Wednesday) \n\n\n\n10:00~11:00\nJustin Sawon\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nQizheng Yin\n\n\n12:30~14:30\nLunch\n\n\n14:30~15:30\nColleen Robles\n\n\n15:30~16:00\nCoffee Break\n\n\n16:00~17:00\nMirko Mauri\n\n\n17:30~19:30\nBanquet\n\n\n\n  \nFebruary 29 (Thursday) \n\n\n\n10:00~11:00\nZhiyuan Li\n\n\n11:00~11:30\nCoffee Break\n\n\n11:30~12:30\nEyal Markman\n\n\n12:30~14:30\nLunch\n\n\n\nOrganizers\nJun-Muk Hwang (IBS-CCG)\nRadu Laza (Stony Brook University)\nYongnam Lee (IBS-CCG/KAIST) \nMain Hotel\nLotte City Hotel Daejeon (4-30 Doryong-dong\, Yuseong-gu\, Daejeon) \nVenue\nIBS Science Culture Center \nRegistration\nPlease submit Google form by February 7. \nMore Information\n• How to get to IBS-CCG
URL:https://ccg.ibs.re.kr/event/2024-02-21-29/
LOCATION:IBS Science Culture Center Daejeon\, Korea\, Republic of (On Feb 23\, the venue will be in B109\, IBS)
CATEGORIES:Conferences and Workshops
ATTACH;FMTTYPE=image/jpeg:https://ccg.ibs.re.kr/wp-content/uploads/2024/03/20240222_photo-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240220T170000
DTEND;TZID=Asia/Seoul:20240220T180000
DTSTAMP:20260416T073708
CREATED:20240130T002012Z
LAST-MODIFIED:20240130T002012Z
UID:2908-1708448400-1708452000@ccg.ibs.re.kr
SUMMARY:Caucher Birkar\, Stable Minimal Models
DESCRIPTION:Zoom ID: 880 6763 5837\nPW: 312515 \n\n    Speaker\n\n\nCaucher Birkar\nTsinghua University\n\n\n\n\n\n\nIn this talk I will introduce stable minimal models and discuss some related results and if times allows\, problems. \n(This seminar is a part of School and Workshop on Moduli\, K-trivial Varieties\, and Related Topics)
URL:https://ccg.ibs.re.kr/event/2024-02-20/
LOCATION:on-line
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20240207T160000
DTEND;TZID=Asia/Seoul:20240207T170000
DTSTAMP:20260416T073708
CREATED:20240104T115944Z
LAST-MODIFIED:20240203T110134Z
UID:2859-1707321600-1707325200@ccg.ibs.re.kr
SUMMARY:Youngju Kim\, Tubular Neighborhoods in Complex Hyperbolic Manifolds
DESCRIPTION:    Speaker\n\n\nYoungju Kim\nKonkuk University\n\n\n\n\n\n\nThe collar lemma says that a closed geodesic in a real hyperbolic 2-manifold has an embedded tubular neighborhood whose width only depends on the length of the geodesic. The width of the collar does not depend on the underlying hyperbolic 2-manifold. On the other hand\, a totally geodesic surface with codimension bigger than 1 in a hyperbolic manifold of can be arbitrary closed to itself. Here\, we prove that an embedded complex totally geodesic surface in a complex hyperbolic 2-manifold has a tubular neighborhood whose size depends only on its area. This is a joint work with A. Basmajian.
URL:https://ccg.ibs.re.kr/event/2024-02-07/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
END:VCALENDAR