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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
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TZOFFSETFROM:+0900
TZOFFSETTO:+0900
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DTSTART:20200101T000000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20211209
DTEND;VALUE=DATE:20211210
DTSTAMP:20260420T023412
CREATED:20211208T150000Z
LAST-MODIFIED:20220124T011541Z
UID:831-1639008000-1639094399@ccg.ibs.re.kr
SUMMARY:Algebraic Geometry Day at CCG in IBS
DESCRIPTION:List of Seminars \n\n\n\n\n\nOn the Singular Loci of Higher Secants of Veronese Varieties\nKangjin Han (DGIST)\n14:00-14:50\, online \n\n\nManin’s Conjecture for a Log Del Pezzo Surface of Index 2\nDongSeon Hwang (Ajou Univ.)\n15:20-16:10\, IBS B266 \n\n\nUlrich Bundles on Cubic Fourfolds\nYeongrak Kim (Pusan National Univ.)\n16:30-17:20\, IBS B266
URL:https://ccg.ibs.re.kr/event/2021-12-09/
LOCATION:B266\, IBS\, Korea\, Republic of
CATEGORIES:Conferences and Workshops
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BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20211209T140000
DTEND;TZID=Asia/Seoul:20211209T145000
DTSTAMP:20260420T023412
CREATED:20211209T050000Z
LAST-MODIFIED:20211207T022951Z
UID:824-1639058400-1639061400@ccg.ibs.re.kr
SUMMARY:Kangjin Han\, On the Singular Loci of Higher Secants of Veronese Varieties
DESCRIPTION:     Speaker\n\n\nKangjin Han\nDGIST\n\n\n\n\n\n\n(This is a part of Algebraic Geometry Day at CCG in IBS.) \nFor a projective variety X in PN\, the k-secant variety σk(X) is defined to be the closure of the union of k-planes in PN spanned by k-points of X. In this talk\, we consider singular loci of higher secant varieties of the image of the d-uple Veronese embedding of projective n-space\, νd(Pn). For the singular loci of k-secant of νd(Pn)\, it has been known only for k≤3. First\, I will review some basic notions and results and then explain projective techniques with respect to an explicit calculation of the Gauss map of X and computation for conormal space via a certain type of Young flattening. As investigating geometry of moving tangents along subvarieties\, we determine the (non-)singularity of so-called ‘subsecant loci’ of k-secant of νd(Pn) for arbitrary k. This is a joint work with Katsuhisa Furukawa.
URL:https://ccg.ibs.re.kr/event/2021-12-09-1400/
LOCATION:on-line
CATEGORIES:Algebraic Geometry Seminar
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