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X-WR-CALNAME:Institute of Mathematics and Informatics
X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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TZID:Europe/Sofia
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TZOFFSETFROM:+0200
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DTSTART:20250330T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250425T130000
DTEND;TZID=Europe/Sofia:20250425T140000
DTSTAMP:20260426T055250
CREATED:20250423T111012Z
LAST-MODIFIED:20250424T153714Z
UID:17652-1745586000-1745589600@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 25 април 2025 г. (петък) от 13:00 часа в зала 578 на ИМИ\nще се проведе заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nHilbert scheme of smooth projective curves and some easy examples\nще изнесе \nChangho Keem\n(Seoul National University\, South Korea).\nAbstract: Hilbert scheme is a parameter space for a family of projective algebraic varieties sharing a given fixed Hilbert polynomial.  In this talk\, we will discuss the following topics concerning the Hilbert scheme of smooth projective algebraic curves. \n1. Irreducibility problem of the restricted Hilbert scheme of curves. \n2. Some easy examples of reducible Hilbert schemes inside or outside the Brill-Noether range. \n3. The existence of more than expected dimensional components whose image under the moduli map has small codimension inside the moduli space of curves of genus g. \n  \nПоканват се всички желаещи да присъстват. \nОт секция „Алгебра и логика” на ИМИ – БАН\nhttp://www.math.bas.bg/algebra/seminarAiL/\n============================== =====================
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b0%d0%bb%d0%b3%d0%b5%d0%b1%d1%80%d0%b0-%d0%b8-%d0%bb%d0%be%d0%b3%d0%b8%d0%ba%d0%b0-119/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%90%D0%BB%D0%B3%D0%B5%D0%B1%D1%80%D0%B0%20%D0%B8%20%D0%BB%D0%BE%D0%B3%D0%B8%D0%BA%D0%B0":MAILTO:algebra_logic_seminar@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250429T140000
DTEND;TZID=Europe/Sofia:20250429T153000
DTSTAMP:20260426T055250
CREATED:20250424T212823Z
LAST-MODIFIED:20250427T075255Z
UID:17670-1745935200-1745940600@math.bas.bg
SUMMARY:Съвместна сбирка на семинара на МЦМН и семинара "Алгебра и Логика"
DESCRIPTION:Съвместна сбирка на семинара на МЦМН и семинара “Алгебра и Логика” в ИМИ\, София\, ще се проведе идния вторник\, с доклад на Георги Томанов\, както следва.\n\nВторник\, 29-ти април\, 14:00 часа\, зала 403 на ИМИ-БАН.\nГеорги Томанов\, Université Claude Bernard\, Lyon 1.\nGroup action on homogeneous spaces and applications in number theory\n\nAbstract: Many longstanding conjectures and problems in number theory can be reformulated in terms of group actions on homogeneous spaces. This reformulation allows them to be tackled using\, alongside deep methods from algebra and algebraic geometry\, powerful tools from ergodic theory and dynamical systems. An example of the effectiveness of this approach is Margulis’s groundbreaking proof of the Oppenheim conjecture (formulated in 1929) concerning the values of quadratic forms at integer points. \nIn this talk\, aimed at a general audience\, we will describe recent results on the characterization of norm forms—a classical object in algebraic number theory—in terms of their values at integer points. These results answer natural questions and are related to still-open conjectures of Littlewood (from 1930) and of Cassels and Swinnerton-Dyer (from 1955). The proofs rely on studying the actions of maximal tori of algebraic groups on homogeneous spaces of arithmetic origin. \n\nПовече информация можете да намерите на страницата на семинара:\nhttps://icms.bg/category/icms-seminar/
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%bd%d0%b0-%d1%81%d0%b1%d0%b8%d1%80%d0%ba%d0%b0-%d0%bd%d0%b0-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80%d0%b0-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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