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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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BEGIN:VTIMEZONE
TZID:Asia/Seoul
BEGIN:STANDARD
TZOFFSETFROM:+0900
TZOFFSETTO:+0900
TZNAME:KST
DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220504T160000
DTEND;TZID=Asia/Seoul:20220504T170000
DTSTAMP:20260614T185047
CREATED:20220330T070000Z
LAST-MODIFIED:20220405T015749Z
UID:1150-1651680000-1651683600@ccg.ibs.re.kr
SUMMARY:Hoang-Chinh Lu\, Monge-Ampère Volumes on Compact Hermitian Manifolds
DESCRIPTION:     Speaker\n\n\nHoang-Chinh Lu\nUniversité Paris-Saclay\, Orsay\n\n\n\n\n\nWe investigate in depth the behaviour of Monge-Ampère volumes of quasi-psh functions on a given compact hermitian manifold. We prove that the property for these Monge-Ampère volumes to stay bounded away from zero or infinity is a bimeromorphic invariant. We show in particular that a conjecture of Demailly-Paun holds true if and only if such Monge-Ampère volumes stay bounded away from infinity. This is a joint work with Vincent Guedj.
URL:https://ccg.ibs.re.kr/event/2022-05-04/
LOCATION:on-line
CATEGORIES:Several Complex Variables Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220510T110000
DTEND;TZID=Asia/Seoul:20220510T120000
DTSTAMP:20260614T185047
CREATED:20220510T020000Z
LAST-MODIFIED:20220428T010609Z
UID:1224-1652180400-1652184000@ccg.ibs.re.kr
SUMMARY:Brendan Hassett\, Recent Progress and Questions on Stable Rationality
DESCRIPTION:     Speaker\n\n\nBrendan Hassett\nICERM / Brown Univ.\n\n\n\n\n\nA complex variety X is rational if its field of meromorphic functions is isomorphic to C(t1\, …\, td)\, the function field of projective space Pd. It is stably rational if X × Pm is rational for some m. Topological and complex invariants give criteria for whether varieties are stably rational but a simple characterization remains elusive. We present results for varieties admitting fibrations in conics\, quadric hypersurfaces\, and rational surfaces using techniques like decomposition of the diagonal. We close with some outstanding open problems. (joint with Kresch and Tschinkel)
URL:https://ccg.ibs.re.kr/event/2022-05-10/
LOCATION:on-line
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220511T160000
DTEND;TZID=Asia/Seoul:20220511T170000
DTSTAMP:20260614T185047
CREATED:20220511T070000Z
LAST-MODIFIED:20220509T012741Z
UID:1250-1652284800-1652288400@ccg.ibs.re.kr
SUMMARY:Lukasz Kosinski\, Extension Property and Interpolation Problems
DESCRIPTION:     Speaker\n\n\nLukasz Kosinski\nJagiellonian University\n\n\n\n\n\nA subset V of a domain Ω has the extension property if for every holomorphic function p on V there is a bounded holomorphic function φ on Ω that agrees with p on V and whose sup-norm on Ω equals the sup-norm of p on V. Within the talk\, we shall study mutual relations between extension property and interpolations problems.
URL:https://ccg.ibs.re.kr/event/2022-05-11/
LOCATION:on-line
CATEGORIES:Several Complex Variables Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220525T160000
DTEND;TZID=Asia/Seoul:20220525T170000
DTSTAMP:20260614T185047
CREATED:20220524T150000Z
LAST-MODIFIED:20220525T012201Z
UID:1209-1653494400-1653498000@ccg.ibs.re.kr
SUMMARY:Xu Wang\, An Explicit Estimate of the Bergman Kernel for Positive Line Bundles
DESCRIPTION:     Speaker\n\n\nXu Wang\nNTNU – Norwegian University of Science and Technology\n\n\n\n\n\n\nWe shall give an explicit estimate of the lower bound of the Bergman kernel associated to a positive line bundle. \nIn the compact Riemann surface case\, our result can be seen as an explicit version of Tian’s partial C0-estimate.
URL:https://ccg.ibs.re.kr/event/2022-05-25/
LOCATION:on-line
CATEGORIES:Several Complex Variables Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220531T153000
DTEND;TZID=Asia/Seoul:20220531T163000
DTSTAMP:20260614T185047
CREATED:20220531T063000Z
LAST-MODIFIED:20220405T104109Z
UID:1244-1654011000-1654014600@ccg.ibs.re.kr
SUMMARY:Sheng Meng\, Equivariant Kähler Model for Fujiki's Class
DESCRIPTION:     Speaker\n\n\nSheng Meng\nKIAS\n\n\n\n\n\nLet X be a compact complex manifold in Fujiki’s class C\, i.e.\, admitting a big (1\,1)-class [α]. Consider Aut(X) the group of biholomorphic automorphisms and Aut[α](X) the subgroup of automorphisms preserving the class [α] via pullback. We show that X admits an Aut[α](X)-equivariant Kähler model: there is a bimeromorphic holomorphic map σ : X~ → X from a Kähler manifold X~ such that Aut[α](X) lifts holomorphically via σ.\nThere are several applications. We show that Aut[α](X) is a Lie group with only finitely many components. This generalizes an early result of Fujiki and Lieberman on the Kähler case.We also show that every torsion subgroup of Aut(X) is almost abelian\, and Aut(X) is finite if it is a torsion group.\nThis is a joint work with Jia Jia.
URL:https://ccg.ibs.re.kr/event/2022-05-31-1530/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20220531T164500
DTEND;TZID=Asia/Seoul:20220531T174500
DTSTAMP:20260614T185047
CREATED:20220531T074500Z
LAST-MODIFIED:20220517T005922Z
UID:1246-1654015500-1654019100@ccg.ibs.re.kr
SUMMARY:Sung Rak Choi\, On the Thresholds of Potential Pairs
DESCRIPTION:     Speaker\n\n\nSung Rak Choi\nYonsei Univ.\n\n\n\n\n\nChoi-Park first introduced and develped the notion of potential pairs. The notion was designed to control the singularities of the outcome of the ‘anticanonical’ minimal model program. In this talk\, after reviewing the properties of potnetial klt pairs\, we examine the ACC property of the potential lc thresholds. This talk is based on the joint work in progress with Sungwook Jang.
URL:https://ccg.ibs.re.kr/event/2022-05-31-1645/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
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