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X-WR-CALDESC:Events for Center for Complex Geometry
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BEGIN:VTIMEZONE
TZID:Asia/Seoul
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TZOFFSETFROM:+0900
TZOFFSETTO:+0900
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DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20241108
DTEND;VALUE=DATE:20241114
DTSTAMP:20260415T203023
CREATED:20240930T083348Z
LAST-MODIFIED:20240930T084043Z
UID:3366-1731024000-1731542399@ccg.ibs.re.kr
SUMMARY:Giancarlo Urzua (Pontificia Universidad Catolica de Chile)
DESCRIPTION:Giancarlo Urzua \nVisitor (2024.11.8-2024.11.13) from Pontificia Universidad Catolica de Chile \nOffice: –
URL:https://ccg.ibs.re.kr/event/giancarlo-urzua-241108-241113/
CATEGORIES:Visitors
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20241112T160000
DTEND;TZID=Asia/Seoul:20241112T170000
DTSTAMP:20260415T203023
CREATED:20240930T082034Z
LAST-MODIFIED:20241111T063450Z
UID:3357-1731427200-1731430800@ccg.ibs.re.kr
SUMMARY:Giancarlo Urzua\, The Birational Geometry of Markov Numbers
DESCRIPTION:    Speaker\n\n\nGiancarlo Urzua\nPontificia Universidad Catolica de Chile\n\n\n\n\n\n\nThe projective plane is rigid. However\, it may degenerate to surfaces with quotient singularities. After the work of Bădescu and Manetti\, Hacking and Prokhorov 2010 classified these degenerations completely. They are Q-Gorenstein partial smoothings of P(a2\, b2\, c2)\, where a\, b\, c satisfy the Markov equation x2+y2+z2=3xyz. Let us call the corresponding degenerations Markovian planes. They are part of a bigger picture of degenerations with Wahl singularities\, where there is an explicit MMP whose final results are either K nef\, smooth deformations of ruled surfaces\, or Markovian planes. Although it is a final result of MMP\, we can nevertheless run MMP on small modifications of Markovian planes to obtain new numerical/combinatorial data for Markov numbers via birational geometry. New connections with Markov conjecture (i.e. Frobenius Uniqueness Conjecture) are byproducts. This is joint work with Juan Pablo Zúñiga (Ph.D. student at UC Chile)\, the pre-print can be found here https://arxiv.org/abs/2310.17957.
URL:https://ccg.ibs.re.kr/event/2024-1112/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20241127T160000
DTEND;TZID=Asia/Seoul:20241127T170000
DTSTAMP:20260415T203023
CREATED:20241029T022418Z
LAST-MODIFIED:20241029T022418Z
UID:3485-1732723200-1732726800@ccg.ibs.re.kr
SUMMARY:Izzet Coskun\, The Geometry of Moduli Spaces of Sheaves on P2
DESCRIPTION:    Speaker\n\n\nIzzet Coskun\nUniversity of Illinois Chicago\n\n\n\n\n\n\nIn this talk\, I will explain how to use Bridgeland stability conditions to compute the ample and effective cones of moduli spaces of sheaves on the projective plane. I will describe the birational geometry of these moduli spaces and give applications to the higher rank interpolation problem. This talk is based on joint work with Jack Huizenga\, John Kopper and Matthew Woolf.
URL:https://ccg.ibs.re.kr/event/2024-1127/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20241128T110000
DTEND;TZID=Asia/Seoul:20241128T120000
DTSTAMP:20260415T203023
CREATED:20241029T022542Z
LAST-MODIFIED:20241029T022542Z
UID:3487-1732791600-1732795200@ccg.ibs.re.kr
SUMMARY:Izzet Coskun\, The Higher Rank Brill-Noether Problem on Surfaces
DESCRIPTION:    Speaker\n\n\nIzzet Coskun\nUniversity of Illinois Chicago\n\n\n\n\n\n\nIn this talk\, I will explain how to use Bridgeland stability conditions to compute the cohomology of a general stable sheaf on a K3 or abelian surface. This talk is based on joint work with Howard Nuer and Kota Yoshioka.
URL:https://ccg.ibs.re.kr/event/2024-1128/
LOCATION:B236-1\, IBS\, Korea\, Republic of
CATEGORIES:Algebraic Geometry Seminar
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