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PRODID:-//Center for Complex Geometry - ECPv6.16.2//NONSGML v1.0//EN
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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:20220101T000000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20230301
DTEND;VALUE=DATE:20240229
DTSTAMP:20260528T033233
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:20230905T160000
DTEND;TZID=Asia/Seoul:20230905T170000
DTSTAMP:20260528T033233
CREATED:20230904T004640Z
LAST-MODIFIED:20230904T004709Z
UID:2498-1693929600-1693933200@ccg.ibs.re.kr
SUMMARY:Takayuki Koike\, On Some Variants of Ueda's Lemma and its Application
DESCRIPTION:    Speaker\n\n\nTakayuki Koike\n(Osaka Metropolitan University)\n\n\n\n\n\n\nIn this talk\, we explain our results on some variants of Ueda’s lemma on L∞-estimates for Cech coboundary operators that hold uniformly for all flat holomorphic line bundles on compact Kähler manifolds. This talk is partially based on joint work with Y. Hashimoto and T. Uehara.Title : Non-measure hyperbolicity of K3 and Enriques surfaces.
URL:https://ccg.ibs.re.kr/event/2023-09-05/
LOCATION:on-line
CATEGORIES:Several Complex Variables Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230906T110000
DTEND;TZID=Asia/Seoul:20230906T120000
DTSTAMP:20260528T033233
CREATED:20230731T072411Z
LAST-MODIFIED:20230731T072411Z
UID:2406-1693998000-1694001600@ccg.ibs.re.kr
SUMMARY:George Hitching\, Brill-Noether Loci on Moduli Space of Symplectic Bundles over a Curve
DESCRIPTION:    Speaker\n\n\nGeorge Hitching\nOslo Metropolitan University\n\n\n\n\n\n\nLet C be a smooth projective curve of genus g. The symplectic Brill-Noether locus S(k\, 2n\, K) parametrises stable bundles of rank 2n over C with at least k independent sections\, and which admit a nondegenerate skewsymmetric bilinear form with values in the canonical bundle K. This is a symmetric determinantal variety whose tangent spaces are described by a symmetrised Petri map. We show for many values of g\, n and k that S(k\, 2n\, K) is nonempty and has a component which is generically smooth and of the expected dimension. As an application\, we show that for certain n and k\, for any curve of large genus the usual Brill-Noether locus B(k\, 2n\, 2n(g-1)) has a component of excess dimension. This is joint work with Ali Bajravani (Tabriz/Berlin).
URL:https://ccg.ibs.re.kr/event/2023-09-06/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230907T110000
DTEND;TZID=Asia/Seoul:20230907T120000
DTSTAMP:20260528T033233
CREATED:20230731T072556Z
LAST-MODIFIED:20230802T012652Z
UID:2408-1694084400-1694088000@ccg.ibs.re.kr
SUMMARY:Thomas Peternell\, Semipositive Tangent Bundles and Canonical Extensions
DESCRIPTION:    Speaker\n\n\nThomas Peternell\nUniversity of Bayreuth\n\n\n\n\n\n\nGiven a projective complex manifold M with an ample polarization there is canonically associated an affine bundle Z over M. The question I will discuss is under which circumstances Z is an affine variety\, or at least Stein. This is related to the global structure of M\, specifically to the semipositivity of the tangent bundle. I will explain the main conjectures and recent results (joint work with A. Höring).
URL:https://ccg.ibs.re.kr/event/2023-09-07-1100-1200/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230907T150000
DTEND;TZID=Asia/Seoul:20230907T160000
DTSTAMP:20260528T033233
CREATED:20230731T073302Z
LAST-MODIFIED:20230731T084230Z
UID:2410-1694098800-1694102400@ccg.ibs.re.kr
SUMMARY:Yum-Tong Siu\, [IBS-KAIST Seminar] Differential Relations for Multiplier Ideal Sheaves in ∂ Estimates
DESCRIPTION:    Speaker\n\n\nYum-Tong Siu\nHarvard University\n\n\n\n\n\n\nFor sums of squares of real vector fields\, Hörmander linked subelliptic estimates to the spanning property of iterated Lie brackets of vector fields. Kohn studied the more complicated analogue of subelliptic ​∂​​​​ estimates for weakly pseudoconvex domains\, with vector-valued unknowns. \nIn the weak-solution approach to solving the ∂​​​ equation\, multipliers for the test function are introduced so that estimates hold after multiplication by a multiplier. Kohn used the dual formulation of differential forms instead of vector fields so that (i) the Lie brackets of vector fields are replaced by differential relations to generate new multipliers and (ii) the spanning property of iterated Lie brackets is replaced by the constant function 1 being a multiplier. \nWe will focus on recent problems and results concerning Kohn’s theory of subelliptic estimates in terms of D’Angelo’s condition of finite type. The distant eventual goal is to explore the theory for differential relations to generate multipliers for subelliptic estimates for a general system of equations with compatibility conditions.
URL:https://ccg.ibs.re.kr/event/2023-09-07-1500-1600/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230908T110000
DTEND;TZID=Asia/Seoul:20230908T120000
DTSTAMP:20260528T033233
CREATED:20230731T073447Z
LAST-MODIFIED:20230904T004225Z
UID:2414-1694170800-1694174400@ccg.ibs.re.kr
SUMMARY:Fabrizio Catanese\, [IBS-KAIST Seminar] Geometry and Dynamics of Geometric Endomorphisms of the Hesse Moduli Space of Elliptic Curves
DESCRIPTION:    Speaker\n\n\nFabrizio Catanese\nUniversity of Bayreuth\n\n\n\n\n\n\nWe consider the geometric map C\, called Cayleyan\, associating to a plane cubic E the adjoint of its dual curve. We show that C and the classical Hessian map H generate a free semigroup. We begin the investigation of the geometry and dynamics of these maps\, and of the geometrically special elliptic curves: these are the elliptic curves isomorphic to cubics in the Hesse pencil which are fixed by some endomorphism belonging to the semigroup generated by H\, C. We point out how the dynamic behaviours of H and C differ drastically. Firstly\, concerning the number of real periodic points: for H these are infinitely many\, for C they are just 4. Secondly\, the Julia set of H is the whole projective line\, unlike what happens for all elements of the semigroup which are not iterates of H.
URL:https://ccg.ibs.re.kr/event/2023-09-08/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230919T110000
DTEND;TZID=Asia/Seoul:20230919T120000
DTSTAMP:20260528T033233
CREATED:20230909T045536Z
LAST-MODIFIED:20230909T045536Z
UID:2522-1695121200-1695124800@ccg.ibs.re.kr
SUMMARY:Seung uk Jang\, Vieta Involutions on Tropical Markov Cubics
DESCRIPTION:    Speaker\n\n\nSeung uk Jang\nUniversité de Rennes 1\n\n\n\n\n\n\nWe discuss the algebraic dynamics on Markov cubics generated by Vieta involutions\, in the tropicalized setting\, including some introduction to the tropicalization. It turns out that there is an invariant subset of the tropicalized Markov cubic where the action by Vieta involutions can be modeled by that of the Farey reflection group on the hyperbolic plane. \nSome applications in non-archimedean dynamics\, number theory\, or complex dynamical questions will also be introduced.
URL:https://ccg.ibs.re.kr/event/2023-09-19/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20230921T150000
DTEND;TZID=Asia/Seoul:20230921T160000
DTSTAMP:20260528T033233
CREATED:20230905T122128Z
LAST-MODIFIED:20230905T122128Z
UID:2506-1695308400-1695312000@ccg.ibs.re.kr
SUMMARY:Yaoxiong Wen\, Generalized Quiver Mutation and PAX/PAXY Models
DESCRIPTION:    Speaker\n\n\nYaoxiong Wen\nKIAS\n\n\n\n\n\n\nDuring this presentation\, I will discuss the generalized quiver mutation conjecture proposed by Prof. Ruan. Our focus will be on proving this conjecture for the Grassmannian bundle. Additionally\, we will explore the determinantal variety and its two different desingularizations\, known as PAX/PAXY models. We will demonstrate the relationship between these models through generalized quiver mutation and prove the PAX/PAXY correspondence in the level of quasimap I-functions. This talk is based on the ongoing research collaboration with Mark Shoemaker and Nathan Priddis.
URL:https://ccg.ibs.re.kr/event/2023-09-21/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Complex Geometry Seminar
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