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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
TZOFFSETTO:+0300
TZNAME:EEST
DTSTART:20230326T010000
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TZOFFSETFROM:+0300
TZOFFSETTO:+0200
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DTSTART:20231029T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230124T150000
DTEND;TZID=Europe/Sofia:20230124T163000
DTSTAMP:20260528T125603
CREATED:20230120T214839Z
LAST-MODIFIED:20230120T214839Z
UID:13707-1674572400-1674577800@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция МОИ
DESCRIPTION:Във вторник от 15:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМЦМН и секция МОИ.\nДоклад на тема:\nЛинейни и циклични кодове над пръстени\nще изнесе д-р Мариам Бажалан\, която започва постдокторантура в ИМИ-БАН по програма ПИКОМ.\n\n\nAbstract: The study of codes over the rings (ring-linear codes) attracted great interest after the work of Calderbank\, Hammons\, Kumar\, Sloane\, and Sole in the early 1990s. In this seminar\, the basic theory of linear codes over finite commutative rings will be presented including the importance of codes over rings\, various kinds of rings for ring-linear coding theory\, the weight functions on finite rings\, MacWilliams equivalence theorem and the connection between these codes and codes over fields via the Gray maps. Moreover\, the cyclic codes over finite commutative rings will be considered. Finally\, some well-known generalizations of cyclic codes such as negacyclic\, quasi-cyclic\, polycyclic\, multivariable\, polynomial and Abelian codes will be introduced.
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8/
LOCATION:Поредица от лекции по теория на представянията и математическа физика – Гордана Тодоров\, лекция 5
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230131T150000
DTEND;TZID=Europe/Sofia:20230131T163000
DTSTAMP:20260528T125603
CREATED:20230127T140512Z
LAST-MODIFIED:20230127T140512Z
UID:13720-1675177200-1675182600@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция МОИ
DESCRIPTION:Във вторник\, 31.01.2023 г.\, от 15:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМЦМН и секция МОИ.\nДоклад на тема:\nВърху оптимално пакетиране на кълба на Минковски и приложения\nще изнесе проф. Николай Глазунов (ИМИ-БАН\, Институт по Кибернетика\, Киев).\n\n\nAbstract: We investigate lattice packings of Minkowski balls and domains. By results of the proof of Minkowski conjecture about the critical determinant we divide the balls and domains on 3 classes: Minkowski\, Davis and Chebyshev-Cohn. The optimal lattice packings of the balls and domains are obtained. The minimum areas of hexagons inscribed in the balls and domains and circumscribed around them are given. These results lead to algebro-geometric structures in the framework of Pontrjagin duality theory.
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230206T121500
DTEND;TZID=Europe/Sofia:20230206T133000
DTSTAMP:20260528T125603
CREATED:20230206T064119Z
LAST-MODIFIED:20230206T064119Z
UID:13771-1675685700-1675690200@math.bas.bg
SUMMARY:Курс по алгебрична геометрия към МЦМН
DESCRIPTION:Следващата лекция от \nКурса по алгебрична геометрия към МЦМН\nще се проведе по изключение на 6 февруари 2023 г. (понеделник) от 12:15 ч. в зала 403 на ИМИ – БАН.
URL:https://math.bas.bg/event/%d0%ba%d1%83%d1%80%d1%81-%d0%bf%d0%be-%d0%b0%d0%bb%d0%b3%d0%b5%d0%b1%d1%80%d0%b8%d1%87%d0%bd%d0%b0-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%ba%d1%8a%d0%bc-%d0%bc%d1%86%d0%bc%d0%bd-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция,Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230214T150000
DTEND;TZID=Europe/Sofia:20230214T163000
DTSTAMP:20260528T125603
CREATED:20230210T163844Z
LAST-MODIFIED:20230210T163844Z
UID:13863-1676386800-1676392200@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция АГТ
DESCRIPTION:Във вторник\, 14.02.2023 г.\, от 15:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМеждународния център за математически науки и секция “Анализ\, геометрия и топология”.\nДоклад на тема:\nJordan algebra conformal toolbox\nще изнесе доц. Тодор Попов (ИЯИЯЕ-БАН\, АУБГ).\n\n\nAbstract
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%b0%d0%b3%d1%82/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230221T140000
DTEND;TZID=Europe/Sofia:20230221T153000
DTSTAMP:20260528T125603
CREATED:20230219T173439Z
LAST-MODIFIED:20230219T173503Z
UID:13920-1676988000-1676993400@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция АГТ
DESCRIPTION:Във вторник\, 21.02.2023 г.\, от 14:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМеждународния център за математически науки и секция “Анализ\, геометрия и топология”.\nДоклад на тема:\nVariations of GIT-quotients of flag varieties\nще изнесе д-р Валдемар Цанов (ИМИ-БАН).\n\n\nAbstract
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%b0%d0%b3%d1%82-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230228T140000
DTEND;TZID=Europe/Sofia:20230228T153000
DTSTAMP:20260528T125603
CREATED:20230223T135108Z
LAST-MODIFIED:20230223T135134Z
UID:13941-1677592800-1677598200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Във вторник\, 28.02.2023 г.\, от 14:00 часа в зала 403 ще състои поредната сбирка на семинара на\nМеждународния център за математически науки.\nДоклад на тема:\nГоренщайнови пръстени в стабилната хомотопна теория\nще изнесе д-р Димитър Коджабашев (ИМИ-БАН).\n\n\nАбстракт. I will discuss a generalization\, due to Dwyer\, Greenlees and Iyengar\, of the notion of a Gorenstein ring from commutative algebra to the algebra of ring spectra. I will illustrate the concept with classical examples from stable homotopy theory as well as more exotic ones coming from derived algebraic geometry\, namely the ring spectra of topological modular forms with level structure. Time permitting\, I will discuss how things generalize equivariantly in the presence of a group action.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230307T140000
DTEND;TZID=Europe/Sofia:20230307T153000
DTSTAMP:20260528T125603
CREATED:20230303T125925Z
LAST-MODIFIED:20230303T125925Z
UID:13959-1678197600-1678203000@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция МОИ
DESCRIPTION:Във вторник\, 07.03.2023 г.\, от 14:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМЦМН и секция МОИ.\nДоклад на тема:\nPlank Problems: Discrete Geometry and Convexity\nще изнесе д-р Александър Полянский (ИМИ-БАН).\n\n\nAbstract: The set of points lying between two parallel lines in the plane is called a plank. Given a convex region C in the plane\, what is the smallest combined width of a finite collection of planks that cover C? What happens in higher dimensions? In the 50s\, Thoger Bang answered this innocent question of Alfred Tarski and opened a box with many deceptively simple-looking problems. \nIn my talk\, I will overview progress in the area and its connection with other fields: theoretical computer science\, number theory\, and analysis. In particular\, I will discuss a joint work with Zilin Jiang confirming Fejes Toth’s long-standing zone conjecture and recent results with Alexey Glazyrin and Roman Karasev on a polynomial plank problem\, a far-reaching generalization of Bang’s theorem.
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230314T140000
DTEND;TZID=Europe/Sofia:20230314T153000
DTSTAMP:20260528T125603
CREATED:20230309T214521Z
LAST-MODIFIED:20230309T214521Z
UID:13973-1678802400-1678807800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Във вторник\, 14.03.2023 г.\, от 14:00 часа в зала 403 ще състои поредната сбирка на семинара на\nМеждународния център за математически науки.\nДоклад на тема:\nNon-Archimedean Uniformization and its application\nще изнесе д-р Jiachang Xu (ИМИ-БАН).\n\n\nАбстракт
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230327
DTEND;VALUE=DATE:20230330
DTSTAMP:20260528T125603
CREATED:20230203T104341Z
LAST-MODIFIED:20230203T104341Z
UID:13758-1679875200-1680134399@math.bas.bg
SUMMARY:RDSP 2023: Recent Developments in Stochastic Processes
DESCRIPTION:Мини-конференцията \nRecent Developments in Stochastic Processes \nще се проведе между 27.03.2023 и 29.03.2023 в Големия Салон на БАН.  \nСъорганизатори са Института по математика и информатика и Факултета по математика и информатика. \nПоканени са изследователи от различни области на вероятностите като е поставен фокус върху стохастичните процеси. \nИма възможност за подаване на заглавие и резюме за contributed talk (срокът за приемане ще бъде удължен). \nСтуденти\, докторанти\, членове на Българското статистическо дружество участват без такса правоучастие. \nСайта на конференцията: https://icms.bg/recent-developments-in-stochastic-processes/ \nЗа повече информация: rdsp2023@icms.bg.
URL:https://math.bas.bg/event/rdsp-2023-recent-developments-in-stochastic-processes/
LOCATION:Българска академия на науките\, ул. „15 ноември“ №1\, София\, София-град\, 1040\, Bulgaria
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230606T150000
DTEND;TZID=Europe/Sofia:20230606T163000
DTSTAMP:20260528T125603
CREATED:20230604T184921Z
LAST-MODIFIED:20230604T184921Z
UID:14497-1686063600-1686069000@math.bas.bg
SUMMARY:Колоквиум на МЦМН
DESCRIPTION:Във вторник\, 06.06.2023 г.\, от 15:00 часа в зала 403 ще състои поредната сбирка на колоквиума на\nМеждународния център за математически науки.\nДоклад на тема:\nArc spaces and partition identities\nще изнесе Hussein Mourtada (Institut de Mathématiques de Jussieu-Paris Rive Gauche).\n\n\nАбстракт
URL:https://math.bas.bg/event/%d0%ba%d0%be%d0%bb%d0%be%d0%ba%d0%b2%d0%b8%d1%83%d0%bc-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230620T140000
DTEND;TZID=Europe/Sofia:20230620T160000
DTSTAMP:20260528T125603
CREATED:20230620T083408Z
LAST-MODIFIED:20230620T084016Z
UID:14565-1687269600-1687276800@math.bas.bg
SUMMARY:Курс на д-р Д. Коджабашев към МЦМН - Лекция 1
DESCRIPTION:Д-р Димитър Коджабашев ще изнесе кратък курс от 4 лекции към МЦМН на тема \nIntroduction to tensor triangular geometry\nЛекциите ще се проведат на 20.06. (вторник)\, 22.06. (четвъртък)\, 27.06. (вторник) и 29.06. (четвъртък) от 14:00 ч. в зала 403 на ИМИ-БАН. \nОписание на курса
URL:https://math.bas.bg/event/%d0%ba%d1%83%d1%80%d1%81-%d0%bd%d0%b0-%d0%b4-%d1%80-%d0%b4-%d0%ba%d0%be%d0%b4%d0%b6%d0%b0%d0%b1%d0%b0%d1%88%d0%b5%d0%b2-%d0%ba%d1%8a%d0%bc-%d0%bc%d1%86%d0%bc%d0%bd-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230622T140000
DTEND;TZID=Europe/Sofia:20230622T160000
DTSTAMP:20260528T125603
CREATED:20230620T084143Z
LAST-MODIFIED:20230620T084254Z
UID:14572-1687442400-1687449600@math.bas.bg
SUMMARY:Курс на д-р Д. Коджабашев към МЦМН - Лекция 2
DESCRIPTION:Д-р Димитър Коджабашев ще изнесе кратък курс от 4 лекции към МЦМН на тема \nIntroduction to tensor triangular geometry\nЛекциите ще се проведат на 20.06. (вторник)\, 22.06. (четвъртък)\, 27.06. (вторник) и 29.06. (четвъртък) от 14:00 ч. в зала 403 на ИМИ-БАН. \nОписание на курса
URL:https://math.bas.bg/event/%d0%ba%d1%83%d1%80%d1%81-%d0%bd%d0%b0-%d0%b4-%d1%80-%d0%b4-%d0%ba%d0%be%d0%b4%d0%b6%d0%b0%d0%b1%d0%b0%d1%88%d0%b5%d0%b2-%d0%ba%d1%8a%d0%bc-%d0%bc%d1%86%d0%bc%d0%bd-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230627T140000
DTEND;TZID=Europe/Sofia:20230627T160000
DTSTAMP:20260528T125603
CREATED:20230620T084451Z
LAST-MODIFIED:20230620T084451Z
UID:14576-1687874400-1687881600@math.bas.bg
SUMMARY:Курс на д-р Д. Коджабашев към МЦМН - Лекция 3
DESCRIPTION:Д-р Димитър Коджабашев ще изнесе кратък курс от 4 лекции към МЦМН на тема \nIntroduction to tensor triangular geometry\nЛекциите ще се проведат на 20.06. (вторник)\, 22.06. (четвъртък)\, 27.06. (вторник) и 29.06. (четвъртък) от 14:00 ч. в зала 403 на ИМИ-БАН. \nОписание на курса
URL:https://math.bas.bg/event/%d0%ba%d1%83%d1%80%d1%81-%d0%bd%d0%b0-%d0%b4-%d1%80-%d0%b4-%d0%ba%d0%be%d0%b4%d0%b6%d0%b0%d0%b1%d0%b0%d1%88%d0%b5%d0%b2-%d0%ba%d1%8a%d0%bc-%d0%bc%d1%86%d0%bc%d0%bd-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230629T140000
DTEND;TZID=Europe/Sofia:20230629T160000
DTSTAMP:20260528T125603
CREATED:20230620T084707Z
LAST-MODIFIED:20230620T084707Z
UID:14578-1688047200-1688054400@math.bas.bg
SUMMARY:Курс на д-р Д. Коджабашев към МЦМН - Лекция 4
DESCRIPTION:Д-р Димитър Коджабашев ще изнесе кратък курс от 4 лекции към МЦМН на тема \nIntroduction to tensor triangular geometry\nЛекциите ще се проведат на 20.06. (вторник)\, 22.06. (четвъртък)\, 27.06. (вторник) и 29.06. (четвъртък) от 14:00 ч. в зала 403 на ИМИ-БАН. \nОписание на курса
URL:https://math.bas.bg/event/%d0%ba%d1%83%d1%80%d1%81-%d0%bd%d0%b0-%d0%b4-%d1%80-%d0%b4-%d0%ba%d0%be%d0%b4%d0%b6%d0%b0%d0%b1%d0%b0%d1%88%d0%b5%d0%b2-%d0%ba%d1%8a%d0%bc-%d0%bc%d1%86%d0%bc%d0%bd-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230630T153000
DTEND;TZID=Europe/Sofia:20230630T190000
DTSTAMP:20260528T125603
CREATED:20230628T123817Z
LAST-MODIFIED:20230628T123817Z
UID:14630-1688139000-1688151600@math.bas.bg
SUMMARY:МЦМН: Лекции на проф. Майкъл Р. Дъглас\, Харвардски университет
DESCRIPTION:На 30 юни 2023 г. от 15:30 часа и 17:00 часа  \nв зала „Проф. Марин Дринов“ на БАН (Голям салон\, ул. „15 ноември“ № 1) \nлекции ще изнесе световноизвестният физик \nProf.  Michael R. Douglas\, Harvard University.\n15:30 ч. Лекция 1: Tameness and quantum field theory \nРезюме: I will discuss the notion of a space of quantum field theories\, and explain various approaches to its definition and some of its expected properties. I will then cover joint work with Thomas Grimm and Lorenz Schlechter on tameness of quantum field theories.  This is based on the mathematical concept of o-minimal structures\, which has been very powerful for proving finiteness results. Given a QFT or a space of QFTs\, we define a corresponding structure\, and conjecture in many cases that it is tame (o-minimal).  We also show that Feynman amplitudes at any fixed loop order are tame. \n17:00 ч. Лекция 2: Numerical methods for differential geometry \nРезюме: State of the art machine learning techniques can be adapted to many problems in scientific and mathematical computation. In this talk\, I will explain how this can be done for problems such as finding a numerical approximation to a Ricci flat metric\, and discuss results for Calabi-Yau and G2 manifolds as well as exploratory studies on other manifolds. \nЛекциите са част от серията Consortium Distinguished Lecture Series – съвместна инициатива  на Международния център по математически науки (МЦМН) към ИМИ-БАН и Institute of the Mathematical Sciences of the Americas at the University of Miami (IMSA). \nПовече информация за лектора\, както и заглавия и абстракти на двата доклада\, ще намерите на следния линк: \nhttps://icms.bg/consortium-distinguished-lecture-series-presents-michael-r-douglas/
URL:https://math.bas.bg/event/%d0%bc%d1%86%d0%bc%d0%bd-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d0%b8-%d0%bd%d0%b0-%d0%bf%d1%80%d0%be%d1%84-%d0%bc%d0%b0%d0%b9%d0%ba%d1%8a%d0%bb-%d1%80-%d0%b4%d1%8a%d0%b3%d0%bb%d0%b0%d1%81-%d1%85%d0%b0/
LOCATION:Българска академия на науките\, ул. „15 ноември“ №1\, София\, София-град\, 1040\, Bulgaria
CATEGORIES:Лекция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231010T140000
DTEND;TZID=Europe/Sofia:20231010T153000
DTSTAMP:20260528T125603
CREATED:20231010T072649Z
LAST-MODIFIED:20231010T073059Z
UID:15105-1696946400-1696951800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:На 10.10.2023 г. (вторник) от 14:00 часа в зала 403 на ИМИ\nще се състои първата сбирка на семинара на МЦМН за 2023/2024 г. \nДоклад на тема: \nAbout a generalisation of Sylvester’s law of inertia\nще изнесе Stéphanie Cupit-Foutou (Ruhr Universitat\, Bohum). \nhttps://icms.bg/about-a-generalisation-of-sylvesters-law-of-inertia-talk-by-stephanie-cupit-foutou/ \nРезюме. Sylvester’s law of inertia can be formulated in terms of group actions when considering real linear groups acting on real quadratic forms by base change. After reviewing this celebrated result from this perspective\, I will give a generalisation of it in the setting of so-called spherical varieties (a class of complex varieties including flag varieties\, toric varieties\, symmetric spaces\, etc.). This is a joint work with D. Timashev
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231017T140000
DTEND;TZID=Europe/Sofia:20231017T153000
DTSTAMP:20260528T125603
CREATED:20231010T074351Z
LAST-MODIFIED:20231010T074351Z
UID:15108-1697551200-1697556600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 17.10.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Михаил Школников\, ИМИ – БАН \nДоклад: Tropical structures in sandpile model \nРезюме: The sandpile model is a cellular automaton that can be defined on any graph. Though it has appeared independently in a variety of contexts\, it attracted tremendous attention from the wide scientific community when its instance on a large domain of the square lattice was put forward as the simplest rigorous example of self-organized criticality. Such phenomena\, real-life examples of which are earthquakes\, solar flares\, or neuronal avalanches\, could be vaguely described as being between order and chaos\, demonstrating power laws without being finely tuned\, and transcending the scale. Tropical geometry\, on the other hand\, is a field of pure mathematics often presented as a combinatorial version of algebraic geometry. I will tell how tropical curves arise in the scaling limit of the sandpile model in the vicinity of the maximal stable state and explain two major consequences inspired by this fact. The first one is that there is a continuous model for self-organized criticality\, the only known model of a kind\, defined in the realm of tropical geometry. The second is that the totality of recurrent states in the original sandpile model\, the sandpile group\, approximates a continuous group\, a tropical Abelian variety\, which is functorial with respect to inclusions of domains\, allowing to compute its scaling limit as a space of circle-valued harmonic functions on the whole lattice. \n\nTropical structures in sandpile model\, talk by Mikhail Shkolnikov\, IMI-BAS \n\n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231030T140000
DTEND;TZID=Europe/Sofia:20231030T153000
DTSTAMP:20260528T125603
CREATED:20231010T080439Z
LAST-MODIFIED:20231010T080439Z
UID:15119-1698674400-1698679800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 30.10.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Петър Далаков\, ИМИ – БАН \nКурс: Introduction to Projective Structures and Opers \nРезюме: A complex projective structure on a Riemann surface is determined by an atlas\, whose transition functions are Moebius (fractional-linear) transformations. There are multiple   descriptions of these structures: as certain flat PGL_2-bundles\, as Sturm-Liouville operators\, as holomorphic connections on the (first) jet bundle of the dual of a theta-characteristic\, etc. This mini-course is an introduction to the fundamentals of projective structures\, accessible to students and non-specialists. We will also explore links to some classical geometric objects (such as quadratic differentials and Schwarzian derivatives)\, as well as some generalisations (G-opers) introduced by Beilinson and Drinfeld. \n\nIntroduction to Projective Structures and Opers\, course by Peter Dalakov \n\n  \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-6/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231031T140000
DTEND;TZID=Europe/Sofia:20231031T153000
DTSTAMP:20260528T125603
CREATED:20231010T080721Z
LAST-MODIFIED:20231010T080721Z
UID:15124-1698760800-1698766200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 31.10.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Петър Далаков\, ИМИ – БАН \nКурс: Introduction to Projective Structures and Opers \nРезюме: A complex projective structure on a Riemann surface is determined by an atlas\, whose transition functions are Moebius (fractional-linear) transformations. There are multiple   descriptions of these structures: as certain flat PGL_2-bundles\, as Sturm-Liouville operators\, as holomorphic connections on the (first) jet bundle of the dual of a theta-characteristic\, etc. This mini-course is an introduction to the fundamentals of projective structures\, accessible to students and non-specialists. We will also explore links to some classical geometric objects (such as quadratic differentials and Schwarzian derivatives)\, as well as some generalisations (G-opers) introduced by Beilinson and Drinfeld. \n\nIntroduction to Projective Structures and Opers\, course by Peter Dalakov \n\n  \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-7/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231102T140000
DTEND;TZID=Europe/Sofia:20231102T153000
DTSTAMP:20260528T125603
CREATED:20231010T081045Z
LAST-MODIFIED:20231010T081045Z
UID:15128-1698933600-1698939000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 02.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Петър Далаков\, ИМИ – БАН \nКурс: Introduction to Projective Structures and Opers \nРезюме: A complex projective structure on a Riemann surface is determined by an atlas\, whose transition functions are Moebius (fractional-linear) transformations. There are multiple   descriptions of these structures: as certain flat PGL_2-bundles\, as Sturm-Liouville operators\, as holomorphic connections on the (first) jet bundle of the dual of a theta-characteristic\, etc. This mini-course is an introduction to the fundamentals of projective structures\, accessible to students and non-specialists. We will also explore links to some classical geometric objects (such as quadratic differentials and Schwarzian derivatives)\, as well as some generalisations (G-opers) introduced by Beilinson and Drinfeld. \n\nIntroduction to Projective Structures and Opers\, course by Peter Dalakov \n\n  \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-8/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231106T140000
DTEND;TZID=Europe/Sofia:20231106T153000
DTSTAMP:20260528T125603
CREATED:20231010T081237Z
LAST-MODIFIED:20231010T081237Z
UID:15132-1699279200-1699284600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 06.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Петър Далаков\, ИМИ – БАН \nКурс: Introduction to Projective Structures and Opers \nРезюме: A complex projective structure on a Riemann surface is determined by an atlas\, whose transition functions are Moebius (fractional-linear) transformations. There are multiple   descriptions of these structures: as certain flat PGL_2-bundles\, as Sturm-Liouville operators\, as holomorphic connections on the (first) jet bundle of the dual of a theta-characteristic\, etc. This mini-course is an introduction to the fundamentals of projective structures\, accessible to students and non-specialists. We will also explore links to some classical geometric objects (such as quadratic differentials and Schwarzian derivatives)\, as well as some generalisations (G-opers) introduced by Beilinson and Drinfeld. \n\nIntroduction to Projective Structures and Opers\, course by Peter Dalakov \n\n  \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-9/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231114T140000
DTEND;TZID=Europe/Sofia:20231114T153000
DTSTAMP:20260528T125604
CREATED:20231010T083449Z
LAST-MODIFIED:20231010T090357Z
UID:15136-1699970400-1699975800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 14.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Валдемар Цанов\, ИМИ – БАН \nКурс: Invariant theory\, homogeneous projective varieties\, and momentum maps \nРезюме: Let \(f:K\to U(V)\) be a unitary representation of a compact Lie group \(K\) with Lie algebra \(\mathfrak k\). This series of talks will be devoted to some recent developments based on relations between the following three classical notions. \n\nThe ring of -invariant polynomials \(\mathbb C[V]^K\) is finitely generated by homogeneous elements\, by a theorem of Hilbert\, but the proof is notoriously nonconstructive. The degrees of a minimal set of generators are canonically determined by \(f\)\, and will be the focus of the discussion.\nThe \(K\)-equivariant momentum map \(\mu:\mathbb P(V)\to \mathfrak k^*\) associated to the Fubini-Study form encodes in its image properties of the invariant ring \(\mathbb C[V]^K\) and the \(K\)-module structure of the entire polynomial ring \(\mathbb C[V]\)\, due to theorems of Mumford and Brion. While many general properties of momentum images have been established\, explicit descriptions remain unknown in many cases south for in physics and quantum information theory.\nProjective geometry of complex \(K\)-orbits in \(\mathbb P(V)\); their fundamental forms\, osculating varieties and secant varieties.\n\nGeneral relations between the first two topics are well established\, even in a more general context. There are also well known relations between invariant theory and projective geometry\, but secant varieties have only recently been brought to the discussion and are subject of current interest. \nAfter introducing the basic notions\, I will derive some properties of momentum images related to fundamental forms and osculating varieties\, as well as a lower bound on the minimal positive degree of a homogeneous invariant\, derived using secant varieties. At the end I will present a class of homogeneous projective varieties\, characterized by a special property of their secant varieties\, where the relations between the above three concepts take a particularly pristine form. \n\nInvariant theory\, homogeneous projective varieties\, and momentum maps\, course by Valdemar Tsanov \n\n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-10/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231115T160000
DTEND;TZID=Europe/Sofia:20231115T173000
DTSTAMP:20260528T125604
CREATED:20231110T165607Z
LAST-MODIFIED:20231110T165607Z
UID:15402-1700064000-1700069400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 15 ноември 2023 г. от 16:00 ч. в зала 403 и онлайн в Zoom:\n\nTopics in non-archimedean analytic geometry (I)\, \nby Jiachang Xu – International Center for Mathematical Sciences (ICMS – Sofia)\n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231116T140000
DTEND;TZID=Europe/Sofia:20231116T153000
DTSTAMP:20260528T125604
CREATED:20231010T091536Z
LAST-MODIFIED:20231010T091536Z
UID:15145-1700143200-1700148600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 16.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Валдемар Цанов\, ИМИ – БАН \nКурс: Invariant theory\, homogeneous projective varieties\, and momentum maps \nРезюме: Let \(f:K\to U(V)\) be a unitary representation of a compact Lie group \(K\) with Lie algebra \(\mathfrak k\). This series of talks will be devoted to some recent developments based on relations between the following three classical notions. \n\nThe ring of -invariant polynomials \(\mathbb C[V]^K\) is finitely generated by homogeneous elements\, by a theorem of Hilbert\, but the proof is notoriously nonconstructive. The degrees of a minimal set of generators are canonically determined by \(f\)\, and will be the focus of the discussion.\nThe \(K\)-equivariant momentum map \(\mu:\mathbb P(V)\to \mathfrak k^*\) associated to the Fubini-Study form encodes in its image properties of the invariant ring \(\mathbb C[V]^K\) and the \(K\)-module structure of the entire polynomial ring \(\mathbb C[V]\)\, due to theorems of Mumford and Brion. While many general properties of momentum images have been established\, explicit descriptions remain unknown in many cases south for in physics and quantum information theory.\nProjective geometry of complex \(K\)-orbits in \(\mathbb P(V)\); their fundamental forms\, osculating varieties and secant varieties.\n\nGeneral relations between the first two topics are well established\, even in a more general context. There are also well known relations between invariant theory and projective geometry\, but secant varieties have only recently been brought to the discussion and are subject of current interest. \nAfter introducing the basic notions\, I will derive some properties of momentum images related to fundamental forms and osculating varieties\, as well as a lower bound on the minimal positive degree of a homogeneous invariant\, derived using secant varieties. At the end I will present a class of homogeneous projective varieties\, characterized by a special property of their secant varieties\, where the relations between the above three concepts take a particularly pristine form. \n\nInvariant theory\, homogeneous projective varieties\, and momentum maps\, course by Valdemar Tsanov \n\n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-11/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231121T140000
DTEND;TZID=Europe/Sofia:20231121T153000
DTSTAMP:20260528T125604
CREATED:20231010T091730Z
LAST-MODIFIED:20231010T091730Z
UID:15149-1700575200-1700580600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 21.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Валдемар Цанов\, ИМИ – БАН \nКурс: Invariant theory\, homogeneous projective varieties\, and momentum maps \nРезюме: Let \(f:K\to U(V)\) be a unitary representation of a compact Lie group \(K\) with Lie algebra \(\mathfrak k\). This series of talks will be devoted to some recent developments based on relations between the following three classical notions. \n\nThe ring of -invariant polynomials \(\mathbb C[V]^K\) is finitely generated by homogeneous elements\, by a theorem of Hilbert\, but the proof is notoriously nonconstructive. The degrees of a minimal set of generators are canonically determined by \(f\)\, and will be the focus of the discussion.\nThe \(K\)-equivariant momentum map \(\mu:\mathbb P(V)\to \mathfrak k^*\) associated to the Fubini-Study form encodes in its image properties of the invariant ring \(\mathbb C[V]^K\) and the \(K\)-module structure of the entire polynomial ring \(\mathbb C[V]\)\, due to theorems of Mumford and Brion. While many general properties of momentum images have been established\, explicit descriptions remain unknown in many cases south for in physics and quantum information theory.\nProjective geometry of complex \(K\)-orbits in \(\mathbb P(V)\); their fundamental forms\, osculating varieties and secant varieties.\n\nGeneral relations between the first two topics are well established\, even in a more general context. There are also well known relations between invariant theory and projective geometry\, but secant varieties have only recently been brought to the discussion and are subject of current interest. \nAfter introducing the basic notions\, I will derive some properties of momentum images related to fundamental forms and osculating varieties\, as well as a lower bound on the minimal positive degree of a homogeneous invariant\, derived using secant varieties. At the end I will present a class of homogeneous projective varieties\, characterized by a special property of their secant varieties\, where the relations between the above three concepts take a particularly pristine form. \n\nInvariant theory\, homogeneous projective varieties\, and momentum maps\, course by Valdemar Tsanov \n\n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-12/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231122T160000
DTEND;TZID=Europe/Sofia:20231122T173000
DTSTAMP:20260528T125604
CREATED:20231121T164225Z
LAST-MODIFIED:20231121T164225Z
UID:15481-1700668800-1700674200@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 22 ноември 2023 г. от 16:00 ч. в зала 403 и онлайн в Zoom:\n\n\nTopics in non-archimedean analytic geometry (II)\n\nby Jiachang Xu – International Center for Mathematical Sciences (ICMS – Sofia)\n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231123T140000
DTEND;TZID=Europe/Sofia:20231123T153000
DTSTAMP:20260528T125604
CREATED:20231010T091918Z
LAST-MODIFIED:20231010T091918Z
UID:15153-1700748000-1700753400@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 23.11.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Валдемар Цанов\, ИМИ – БАН \nКурс: Invariant theory\, homogeneous projective varieties\, and momentum maps \nРезюме: Let \(f:K\to U(V)\) be a unitary representation of a compact Lie group \(K\) with Lie algebra \(\mathfrak k\). This series of talks will be devoted to some recent developments based on relations between the following three classical notions. \n\nThe ring of -invariant polynomials \(\mathbb C[V]^K\) is finitely generated by homogeneous elements\, by a theorem of Hilbert\, but the proof is notoriously nonconstructive. The degrees of a minimal set of generators are canonically determined by \(f\)\, and will be the focus of the discussion.\nThe \(K\)-equivariant momentum map \(\mu:\mathbb P(V)\to \mathfrak k^*\) associated to the Fubini-Study form encodes in its image properties of the invariant ring \(\mathbb C[V]^K\) and the \(K\)-module structure of the entire polynomial ring \(\mathbb C[V]\)\, due to theorems of Mumford and Brion. While many general properties of momentum images have been established\, explicit descriptions remain unknown in many cases south for in physics and quantum information theory.\nProjective geometry of complex \(K\)-orbits in \(\mathbb P(V)\); their fundamental forms\, osculating varieties and secant varieties.\n\nGeneral relations between the first two topics are well established\, even in a more general context. There are also well known relations between invariant theory and projective geometry\, but secant varieties have only recently been brought to the discussion and are subject of current interest. \nAfter introducing the basic notions\, I will derive some properties of momentum images related to fundamental forms and osculating varieties\, as well as a lower bound on the minimal positive degree of a homogeneous invariant\, derived using secant varieties. At the end I will present a class of homogeneous projective varieties\, characterized by a special property of their secant varieties\, where the relations between the above three concepts take a particularly pristine form. \n\nInvariant theory\, homogeneous projective varieties\, and momentum maps\, course by Valdemar Tsanov \n\n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-13/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231205T140000
DTEND;TZID=Europe/Sofia:20231205T153000
DTSTAMP:20260528T125604
CREATED:20231010T092252Z
LAST-MODIFIED:20231130T141804Z
UID:15157-1701784800-1701790200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 05.12.2023 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Богдан Станков\, ИМИ – БАН \nДоклад: Recent developments in the study of Følner functions \nДопълнителна информация: https://icms.bg/recent-developments-in-the-study-of-folner-functions-talk-by-bogdan-stankov/
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-14/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231206T160000
DTEND;TZID=Europe/Sofia:20231206T173000
DTSTAMP:20260528T125604
CREATED:20231130T142439Z
LAST-MODIFIED:20231130T142439Z
UID:15607-1701878400-1701883800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 6 декември 2023 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \n\nIntroduction to tropical modifications (II)\nще изнесе Никита Калинин\, Международен център по математически науки (МЦМН – София). \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20231213T160000
DTEND;TZID=Europe/Sofia:20231213T173000
DTSTAMP:20260528T125604
CREATED:20231207T212005Z
LAST-MODIFIED:20231207T212005Z
UID:15684-1702483200-1702488600@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 13 декември 2023 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \n\nValuations of Higher Rank\nще изнесе Андрей Бенгуш-Ласние\, Международен център по математически науки (МЦМН – София). \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-5/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
END:VCALENDAR