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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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TZNAME:EEST
DTSTART:20230326T010000
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DTSTART:20231029T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230221T140000
DTEND;TZID=Europe/Sofia:20230221T153000
DTSTAMP:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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:20260616T042008
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240109T140000
DTEND;TZID=Europe/Sofia:20240109T153000
DTSTAMP:20260616T042008
CREATED:20240104T172534Z
LAST-MODIFIED:20240104T172819Z
UID:15789-1704808800-1704814200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 09.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: д-р Антони Рангачев\, ИМИ – БАН \nДоклад: Stratified Morse theory and the critical locus of a linear functional \nДопълнителна информация: https://icms.bg/stratified-morse-theory-and-the-critical-locus-of-a-linear-functional-talk-by-antony-rangachev/ \nРезюме. In this talk I will use stratified Morse theory to relate the number of critical points of a generic linear functional on a complex analytic manifold M to the Euler characteristics of M and a generic hyperplane slice of M.
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-15/
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:20240111T140000
DTEND;TZID=Europe/Sofia:20240111T153000
DTSTAMP:20260616T042008
CREATED:20240104T175203Z
LAST-MODIFIED:20240104T175203Z
UID:15795-1704981600-1704987000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 11.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: д-р Антони Рангачев\, ИМИ – БАН \nДоклад: The Milnor number of a smoothable curve \nДопълнителна информация: https://icms.bg/the-milnor-number-of-a-smoothable-curve-talk-by-antony-rangachev/ \nРезюме. In this talk I will derive an algebraic formula for the Milnor number of a smoothable complex analytic curve singularity X by relating it to the Euler characteristic of its smoothing\, which in turn I will relate to the multiplicity of the Jacobian ideal of X and and the multiplicity of X at its singular point. If time permits I will discuss generalizations to higher dimensions. This is a report on a joint work with Gaffney and Bengus-Lasnier. \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-16/
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:20240116T140000
DTEND;TZID=Europe/Sofia:20240116T153000
DTSTAMP:20260616T042008
CREATED:20240112T124026Z
LAST-MODIFIED:20240112T124026Z
UID:15841-1705413600-1705419000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 16.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Carlos Varea (Universidade Tecnológica  Federal do Paraná – Campus Cornélio Procópio\, Brazil) \nДоклад: The H-flux on flag manifolds generated by infinitesimal T-duality \nДопълнителна информация: https://icms.bg/the-h-flux-on-flag-manifolds-generated-by-infinitesimal-t-duality-talk-by-carlos-varea/ \nРезюме. In this talk we present a new correspondence for pairs \((\mathbb{F}\,H)\) formed by a flag manifold \(\mathbb{F}\) together with an $H$-flux on \(\mathbb{F}\). Given its role within our correspondence\, infinitesimal \(T\)-duality may be viewed as a source of \(H\)-flux\, in the sense that it contributes towards taking fluxless pairs \((\mathbb{F}\,0)\) to pairs \((\mathbb{F}^\vee\, H^\vee)\) carrying nontrivial flux \(H^\vee\neq 0\). We also illustrate how our correspondence exchanges complex structures with symplectic ones up to \(B\)-transformations. This is a joint work with Elizabeth Gasparim and Lino Grama.
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-17/
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:20240118T130000
DTEND;TZID=Europe/Sofia:20240118T143000
DTSTAMP:20260616T042008
CREATED:20240110T072831Z
LAST-MODIFIED:20240114T173529Z
UID:15812-1705582800-1705588200@math.bas.bg
SUMMARY:Съвместно заседание на Семинара на секция „Алгебра и логика” и Семинара на МЦМН
DESCRIPTION:На 18 януари 2024 г. (четвъртък) от 13:00 часа в зала 403 на ИМИ-БАН и онлайн чрез платформата zoom ще се проведе съвместно заседание на \nСеминара на секция „Алгебра и логика” \nи Семинара на Международния център по математически науки към ИМИ-БАН. \nДоклад на тема \nNilpotent algebras\, groups and beyond\nще изнесе Yuri Bahturin (Memorial University of Newfoundland\, Canada) (joint work with Alexander Olshanskii). \nАбстракт: We study various correspondences between finite-dimensional nilpotent algebras and (quasi)groups similar to those given by the circle product in the case of associative algebras or by the Baker-Campbell-Hausdorff formulas in the the case of Lie algebras or their generalizations. In the particular case of Malcev’s correspondence\, we obtain some new results about groups using Lie algebras and vice versa. \nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nПоканват се всички желаещи да присъстват. \nОт секция „Алгебра и логика” и МЦМН\nhttp://www.math.bas.bg/algebra/seminarAiL/\nhttps://icms.bg/category/icms-seminar/\n===================================================
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%bd%d0%be-%d0%b7%d0%b0%d1%81%d0%b5%d0%b4%d0%b0%d0%bd%d0%b8%d0%b5-%d0%bd%d0%b0-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80%d0%b0-%d0%bd%d0%b0-%d1%81%d0%b5/
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
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END:VCALENDAR