BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Institute of Mathematics and Informatics - ECPv6.0.8//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
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
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Sofia
BEGIN:DAYLIGHT
TZOFFSETFROM:+0200
TZOFFSETTO:+0300
TZNAME:EEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0200
TZNAME:EET
DTSTART:20241027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240910T140000
DTEND;TZID=Europe/Sofia:20240910T153000
DTSTAMP:20260429T224518
CREATED:20240909T210739Z
LAST-MODIFIED:20240909T212122Z
UID:16725-1725976800-1725982200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 10.09.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Боаз Моерман (Утрехтски университет) \nДоклад: Generalized integral points and strong approximation \nДопълнителна информация: https://icms.bg/generalized-integral-points-and-strong-approximation-talk-by-boaz-moerman/ \nРезюме. The Chinese remainder theorem states that given coprime integers \(p_1\, …\, p_n\) and integers \(a_1\, …\, a_n\)\, we can always find an integer \(m\) such that \(m \equiv a_i \mbox{ mod } p_i\) for all \(i\). Similarly given distinct numbers \(x_1\,…\, x_n\) and \(y_1\, …\, y_n\) we can find a polynomial \(f\) such that \(f(x_i)=y_i\). These statements are two instances of strong approximation for the affine line (over the integers \(\mathbb{Z}\) and the polynomials \(k[x]\) over a field \(k\)). In this talk we will consider when an analogue of this holds for special subsets of \(\mathbb{Z}\) and \(k[x]\)\, such as squarefree integers or polynomials without simple roots\, and different varieties. We give a precise description for which subsets this holds on a toric variety.
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-24/
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:20240903T140000
DTEND;TZID=Europe/Sofia:20240903T153000
DTSTAMP:20260429T224518
CREATED:20240829T155653Z
LAST-MODIFIED:20240829T155653Z
UID:16712-1725372000-1725377400@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:About maximal distance minimizers. What is it and why they are so good?\nДокладчик: Яна Теплицкая\nДата: 03.09.2024 г.\nЧас: 14:00 ч.\nМясто: зала 256 \nРезюме \n 
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%bf%d1%80%d0%b8%d0%bb%d0%be%d0%b6%d0%bd%d0%b0-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0-12/
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:20240806T140000
DTEND;TZID=Europe/Sofia:20240806T153000
DTSTAMP:20260429T224518
CREATED:20240802T135437Z
LAST-MODIFIED:20240802T135437Z
UID:16648-1722952800-1722958200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 06.08.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: проф. Младен Димитров (Университет на Лил) \nДоклад: P-adic L-functions and the geometry of the Eigencurve \nДопълнителна информация: https://icms.bg/p-adic-l-functions-and-the-geometry-of-the-eigencurve-talk-by-mladen-dimitrov/ \nРезюме. For centuries\, understanding special values of L-functions has been a significant research topic in number theory. Their study has been central to many celebrated pieces of mathematics\, from Dirichlet’s theorem on primes in arithmetic progressions and the class number formula to the Riemann hypothesis and the Birch and Swinnerton-Dyer (BSD) conjecture\, two of the famous millennium problems. \nThe BSD conjecture predicts that the Mordell–Weil rank of an elliptic curve is given by the order of vanishing of its L-function the central point. Iwasawa theory\, in turn\, seeks to relate the arithmetic over the p-adic cyclotomic extension with the behavior of a p-adic analytic L-function\, and various recent works on the BSD conjecture rely crucially on such p-adic methods. \nAn amazing feature of the p-adic L-functions is their ability to live in families\, thus their laws are governed by the geometry of p-adic eigenvarieties. In this lecture we will illustrate this philosophy through examples coming from classical modular forms and the Coleman-Mazur eigencurve.
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-23/
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:20240710T150000
DTEND;TZID=Europe/Sofia:20240710T160000
DTSTAMP:20260429T224518
CREATED:20240701T114512Z
LAST-MODIFIED:20240702T121615Z
UID:16500-1720623600-1720627200@math.bas.bg
SUMMARY:Семинар на секция „Математически основи на информатиката”
DESCRIPTION:На 10 юли 2024 г. (сряда) от 15:00 часа в зала 256 на ИМИ-БАН\nще се проведе заседание на семинара на секция\n„Математически основи на информатиката”. \nДоклад на тема \nA Bollobás-type problem: from root systems to\nErdős–Ko–Rado\nще изнесе Qendrim Gashi\,\nDepartment of Mathematics\, University of Prishtina \n  \nАбстракт може да прочетете тук.
URL:https://math.bas.bg/event/16500/
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:20240709T150000
DTEND;TZID=Europe/Sofia:20240709T160000
DTSTAMP:20260429T224518
CREATED:20240701T082134Z
LAST-MODIFIED:20240702T120935Z
UID:16486-1720537200-1720540800@math.bas.bg
SUMMARY:Семинар на секция „Математически основи на информатиката”
DESCRIPTION:На 9 юли 2024 г. (вторник) от 15:00 часа в зала 256 на ИМИ-БАН\nще се проведе заседание на семинара на секция\n„Математически основи на информатиката”. \nДоклад на тема \nLinear and polycyclic codes over some affine\nalgebra rings\nще изнесе Edgar Martìnez-Morо\,\nUniversity of Valladolid\, Castilla\, Spain\n \nПроф. Едгар Мартинез-Моро гостува в София в рамките на Научна програма “Повишаване на изследователския капацитет в областта на математическите науки” (ПИКОМ). \nАбстракт и кратка биографична справка за проф. Моро може да прочетете тук.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%b8-%d0%be%d1%81%d0%bd-5/
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:20240703T140000
DTEND;TZID=Europe/Sofia:20240703T153000
DTSTAMP:20260429T224518
CREATED:20240629T133318Z
LAST-MODIFIED:20240629T133318Z
UID:16481-1720015200-1720020600@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 3 юли 2024 г. (сряда) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nControl Problems for Queuing Systems with Moving Servers\nще изнесе \nAsaf Hajiyev (Azerbaijan National Academy of Sciences\, Institute of Control systems). \nАбстракт. For queuing systems with moving servers\, the control policy which means delays of a beginning service is introduced. In the capacity of efficiency index of systems is taken a customer’s average waiting time before service. Although it seems that it is a paradoxical idea to delay the beginning of service\, it has been proved that for some systems it gives a gain in a customer’s average waiting time before service. The class of queuing systems for which it is advisable to introduce delays is described. The form of an optimal function minimizing the efficiency index is found. It is shown that if a distance between neighbor services has exponential distribution\, then the gain in a customer’s average waiting time before service equals 10% and independent of parameter of exponential distribution. For uniform distribution such gain equals 3.5% and also independent of parameter of uniform distribution. The criterion to define for which systems the gain is greater are given. Numerical examples demonstrating theoretical results are given. \n\n 
URL:https://math.bas.bg/event/%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d1%81%d1%82%d0%be%d1%85%d0%b0%d1%81%d1%82%d0%b8%d0%ba%d0%b0-43/
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:20240703T140000
DTEND;TZID=Europe/Sofia:20240703T153000
DTSTAMP:20260429T224518
CREATED:20240629T123355Z
LAST-MODIFIED:20240629T125043Z
UID:16468-1720015200-1720020600@math.bas.bg
SUMMARY:Семинар "Диференциални уравнения и математическа физика"
DESCRIPTION:На 03.07.2024 г. от 14:00 ч. в зала 478 на ИМИ\nи дистанционно в Zoom ще се състои поредната сбирка на\nсеминара по Диференциални уравнения и математическа физика.\nДоклад на тема \nМЕТОД НА ТОЧНА ДИАГОНАЛИЗАЦИЯ В ОБЛАСТТА НА МОЛЕКУЛНИЯ МАГНЕТИЗЪМ\nще изнесе д-р Мирослав Георгиев. \nАбстракт. Малко след възникването на наномагнетизма\, като самостоятелна подобласт на магнетизма\, стремежът към синтезирането на молекулни магнити с подходящи за приложение в сферата на нанотехнологиите магнитни свойства заема основно място сред изследванията в областта [1-3]. Това поражда необходимостта от по-задълбочено познаване на микроскопичната динамика стояща в основата на магнитните свойства на тези системи. Ето защо прилагането на първопринципни теоретични изследвания\, включващи математични методи като матрица на плътността\, точна диагонализация и квантова теория на пертурбациите\, насочени в това направление се радват на широк интерес през последните две десетилетия [3]. \nНастоящият доклад ще ни запознае с основни стъпки от прилагането на метода на точна диагонализация\, като първопринципен моногоконфигурационен самосъгласуван подход при изследването на системи от молекулни магнити на микроскопично ниво. Включен е и пример показващ близостта между теория и експеримент след изчислението на магнитните свойствата на съединението [Ni(MDABCO)2Cl3 ]ClO4 с докладваня метод. \nЛинка към Зуум стаята следва: \nTopic: Доклад на д-р Мирослав Георгиев\nTime: Jul 3\, 2024 14:00 Sofia \nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/87099331737?pwd=w8894QHkbq1UTc2n3qr7dC7yTLPYI6.1 \nMeeting ID: 870 9933 1737\nPasscode: 263339
URL:https://math.bas.bg/event/copy-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d1%84%d0%b5%d1%80%d0%b5%d0%bd%d1%86%d0%b8%d0%b0%d0%bb%d0%bd%d0%b8-%d1%83%d1%80%d0%b0%d0%b2%d0%bd%d0%b5%d0%bd%d0%b8%d1%8f-%d0%b8-%d0%bc/
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%94%D0%B8%D1%84%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8%20%D1%83%D1%80%D0%B0%D0%B2%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F%20%D0%B8%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%20%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0":MAILTO:seminar_differential_equations@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240702T140000
DTEND;TZID=Europe/Sofia:20240702T153000
DTSTAMP:20260429T224518
CREATED:20240629T132516Z
LAST-MODIFIED:20240629T132516Z
UID:16477-1719928800-1719934200@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 2-ри юли (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nOn some contemporary mathematical methods for data analysis\nще изнесе проф. Пандо Георгиев\, ИМИ-БАН. \nАбстракт:\n\nWe will review some selected methods and algorithms for data analysis:\nA) Latent component analysis – reveals hidden features of composite data. Particularly\, we will describe some\n    Signal Separation Methods:\n\nbased on statistical independence – Independent Component Analysis\nbased on sparsity. – Sparse Component Analysis\nbased on non-negativity – Non-Negative Matrix and Tensor Factorization\n\nB) New approach to multiclass learning problems and applications to some problems in machine learning\, as:\n\nnonlinear least square problems\nsubspace clustering and non-linear skeletons\nreconstruction of several functions from mixed samples\nsupport vector kernel regression (under development)\n\nC) kernel methods for data analysis\nD) tensor decompositions  and tensor networks.\nSome of the above topics are interconnected and subject to intensive development with numerous applications.
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%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-3/
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%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240701T140000
DTEND;TZID=Europe/Sofia:20240701T153000
DTSTAMP:20260429T224518
CREATED:20240629T125913Z
LAST-MODIFIED:20240629T125913Z
UID:16473-1719842400-1719847800@math.bas.bg
SUMMARY:Семинар "Диференциални уравнения и математическа физика"
DESCRIPTION:На 01.07.2024 г. от 14:00 ч. в стая 578 на ИМИ и онлайн в Zoom\nще се състои поредната сбирка на семинара по\nДиференциални уравнения и математическа физика.\nДоклад на тема \np-Adic Numbers\, Neural Networks\, Deep Learning\, and Statistical Field Theories\nще изнесе Prof. W. A. Zuniga-Galindo from University of Texas Rio Grande Valley. \nАБСТРАКТ \nThe talk aims to glimpse our recent research work on the mathematical foundations of hierarchical neural networks.  I plan to cover the following topics: (1) the non-Archimedean Wilson-Cowan Model; (2) p-adic Cellular Neural Networks; (3) p-Adic Statistical Field Theory and Deep Boltzmann Machines. In the first part of the talk\, I present a hierarchical version of the Wilson-Cowan model\, one of the most relevant models in theoretical neuroscience (see Reference [1]). The second part is dedicated to p-adic cellular neural networks and their applications to image processing (see Reference [2]). Finally\, I plan to present the results of Reference [3] on the connections between deep Boltzmann machines and Euclidean quantum field theories. \nIn deep learning architectures\, the neurons are organized in layers to form a hierarchical structure. These systems comprise several subsystems and are characterized by emergent behavior resulting from nonlinear interactions between subsystems for multiple levels of organization. The non-Archimedean analysis is the natural tool for constructing mathematical models of hierarchically organized systems. \nРЕФЕРЕНЦИИ \n[1] W.A.  Zúñiga-Galindo\, B.A.  Zambrano-Luna. Hierarchical Wilson-Cowan Models and Connection Matrices. Entropy (Basel). 2023 Jun 16;25(6):949. https://doi.org/10.3390/e25060949. \n[2] B. A. Zambrano-Luna\, W.A. Zúñiga-Galindo\, p-adic cellular neural networks: Applications to image processing\, Physica D: Nonlinear Phenomena\, Volume 446\, 2023\, 133668. https://doi.org/10.1016/j.physd.2023.133668. \n[3] W. A. Zúñiga-Galindo\, C He\, B A Zambrano-Luna\, p-Adic statistical field theory and convolutional deep Boltzmann machines\, Progress of Theoretical and Experimental Physics\, Volume 2023\, Issue 6\, June 2023\, 063A01\, https://doi.org/10.1093/ptep/ptad061 \nZOOM линк: \nhttps://us02web.zoom.us/j/89875774511?pwd=vBuAtZiYK6eb4XdFQaj9RuIG9GTB6J.1 \nTime: Jul 1\, 2024 14:00 Sofia\n\nMeeting ID: 898 7577 4511\nPasscode: 305339
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d1%84%d0%b5%d1%80%d0%b5%d0%bd%d1%86%d0%b8%d0%b0%d0%bb%d0%bd%d0%b8-%d1%83%d1%80%d0%b0%d0%b2%d0%bd%d0%b5%d0%bd%d0%b8%d1%8f-%d0%b8-%d0%bc%d0%b0-4/
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%94%D0%B8%D1%84%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8%20%D1%83%D1%80%D0%B0%D0%B2%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F%20%D0%B8%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%20%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0":MAILTO:seminar_differential_equations@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240626T161500
DTEND;TZID=Europe/Sofia:20240626T173000
DTSTAMP:20260429T224518
CREATED:20240617T112706Z
LAST-MODIFIED:20240617T132705Z
UID:16445-1719418500-1719423000@math.bas.bg
SUMMARY:Национален колоквиум по математика
DESCRIPTION:СЪЮЗ НА МАТЕМАТИЦИТЕ В БЪЛГАРИЯ\n\nИНСТИТУТ ПО МАТЕМАТИКА И ИНФОРМАТИКА – БАН \n\n\n\nНАЦИОНАЛЕН КОЛОКВИУМ ПО МАТЕМАТИКА\n\n​Поредната сбирка на Колоквиума ще се състои на 26 юни 2024 г. (сряда)  от 16:15 часа в Заседателната зала на ИМИ – БАН. Доклад на тема:\n\nУстойчивост на нелинейни вълни\nще изнесе проф. дмн Севджан Хаккъев\,\nИнститут по матем​атика и информатика\, Българска академия на науките. \n\n\n​Резюме
URL:https://math.bas.bg/event/copy-%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d0%ba%d0%be%d0%bb%d0%be%d0%ba%d0%b2%d0%b8%d1%83%d0%bc-%d0%bf%d0%be-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D1%8A%D1%8E%D0%B7%20%D0%BD%D0%B0%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D1%86%D0%B8%D1%82%D0%B5%20%D0%B2%20%D0%91%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D0%B8%D1%8F":MAILTO:smb.sofia@gmail.com
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240618T140000
DTEND;TZID=Europe/Sofia:20240618T153000
DTSTAMP:20260429T224518
CREATED:20240612T172158Z
LAST-MODIFIED:20240612T172158Z
UID:16441-1718719200-1718724600@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 18-ти юни (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nMathematical modelling of torque-velocity and torque-angle relationships – part 2: numerical results\nще изнесе проф. Петър Миланов\, ИМИ-БАН и ЮЗУ.
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%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-2/
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%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240611T150000
DTEND;TZID=Europe/Sofia:20240611T160000
DTSTAMP:20260429T224518
CREATED:20240430T104431Z
LAST-MODIFIED:20240430T105107Z
UID:16272-1718118000-1718121600@math.bas.bg
SUMMARY:Семинар на секция “Математически основи на информатиката”
DESCRIPTION:На 11 юни 2024 г. (вторник)\nот 15:00 часа\nв зала 503 на ИМИ-БАН\nще се проведе заседание на семинара на\nсекция „Математически основи на информатиката”.\n\nДоклад на тема:\n\nHadamard matrices with automorphisms of prime\norder and related codes\n\nще изнесе\nпроф. Владимир Тончев\,\nMichigan Technological University\, Houghton\, USA.\n\n\n\n\nАбстракт на доклада може да изтеглите тук.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8/
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:20240611T140000
DTEND;TZID=Europe/Sofia:20240611T153000
DTSTAMP:20260429T224518
CREATED:20240605T202851Z
LAST-MODIFIED:20240605T202851Z
UID:16406-1718114400-1718119800@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 11-ти юни (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nMathematical modelling of torque-velocity and torque-angle relationships\nще изнесе проф. Петър Миланов\, ИМИ-БАН и ЮЗУ.
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%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%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%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240607T123000
DTEND;TZID=Europe/Sofia:20240607T140000
DTSTAMP:20260429T224518
CREATED:20240605T211422Z
LAST-MODIFIED:20240605T211422Z
UID:16409-1717763400-1717768800@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 7 юни 2024 г. (петък) от 12:30 часа в зала 503 на ИМИ\nще се проведе присъствено заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nSome Properties and Applications of Kloosterman Sums on Finite Fields\nще изнесе \nЛюбомир Борисов\, ИМИ – БАН. \nАбстракт \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%b0-114/
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:20240604T140000
DTEND;TZID=Europe/Sofia:20240604T153000
DTSTAMP:20260429T224518
CREATED:20240603T104609Z
LAST-MODIFIED:20240603T104609Z
UID:16402-1717509600-1717515000@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 4 юни 2024 г. (сряда) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nComparison of parameter estimation methods for a Beta-Uniform mixture model\nще изнесе \nНиколай И. Николов (ИМИ-БАН). \nАбстракт. The Benjamini-Hochberg (B-H) method is a procedure for controlling the false discovery rate in the problem of multiple comparisons and is one of the most cited scientific works. In this talk\, a Beta-Uniform mixture is considered for approximating the distribution of the p-values before the B-H adjustment. Expectation-maximization algorithms are derived for finding the maximum-likelihood and the maximum product of spacings estimations of the parameters in the suggested model. In addition\, the method of moments is also applied for estimating the unknown parameters. The bias and mean squared error of the proposed estimation procedures are compared via numerical simulations. The talk is based on a joint work with Dean Palejev (Bulgarian Academy of Sciences\, Sofia University). \n\n 
URL:https://math.bas.bg/event/%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d1%81%d1%82%d0%be%d1%85%d0%b0%d1%81%d1%82%d0%b8%d0%ba%d0%b0-42/
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:20240528T150000
DTEND;TZID=Europe/Sofia:20240528T163000
DTSTAMP:20260429T224518
CREATED:20240523T174358Z
LAST-MODIFIED:20240523T174358Z
UID:16356-1716908400-1716913800@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:An efficient approach for searching three-body periodic orbits passing through Euler configuration\nДокладчик: Иван Христов (ФМИ-СУ)\nДата: 28.05.2024 г.\nЧас: 15:00 ч.\nМясто: зала 503 \nРезюме: The classic gravitational three-body problem is considered. The motion of the bodies is determined by Newton’s second law and Newton’s law of universal gravitation. We are interested in a special case of planar periodic orbits – those that pass through Euler configuration. \nIn this talk a new efficient approach for searching three-body periodic equal-mass collisionless orbits passing through Euler configuration is presented [1]. The approach is based on a symmetry property of the solutions at the half period. Depending on two previously established symmetry types on the shape sphere\, each solution is presented by one or two distinct initial conditions (one or two points in the search domain). A high precision numerical search based on Newton-Raphson method on a relatively coarse search grid for solutions with relatively short scale-invariant periods is conducted. The results of the search clearly demonstrate the efficiency of the approach. More than 12\,000 initial conditions for periodic collisionless orbits (most of which new ones) are found. The extensive high precision computations are performed in Nestum cluster\, Sofia Tech Park. \n[1] Ivan Hristov\, Radoslava Hristova. “An efficient approach for searching three-body periodic orbits passing through Eulerian configuration.” arXiv preprint arXiv:2404.16526 (2024). \n 
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%bf%d1%80%d0%b8%d0%bb%d0%be%d0%b6%d0%bd%d0%b0-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0-10/
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:20240527T150000
DTEND;TZID=Europe/Sofia:20240527T160000
DTSTAMP:20260429T224518
CREATED:20240515T155053Z
LAST-MODIFIED:20240515T155053Z
UID:16328-1716822000-1716825600@math.bas.bg
SUMMARY:Семинар на секция “Математически основи на информатиката”
DESCRIPTION:На 27 май 2024 г. от 15:00 часа в зала 503 на ИМИ-БАН\nще се проведе заседание на семинара на\nсекция „Математически основи на информатиката”.\nДоклад на тема:\nTowards a Baranyai theorem with additional condition\nще изнесе  Gyula Katona\, Renyi Institute\, Budapest\, Hungary.\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-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%b8-%d0%be%d1%81%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:20240520T143000
DTEND;TZID=Europe/Sofia:20240520T160000
DTSTAMP:20260429T224518
CREATED:20240513T190537Z
LAST-MODIFIED:20240513T190537Z
UID:16304-1716215400-1716220800@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 20.05.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nАксиоматика и построяване на планиметрията на векторна основа\nще изнесe \nдоц. Бойко Банчев.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d0%b4%d0%b0%d0%ba%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-38/
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:20240516T161500
DTEND;TZID=Europe/Sofia:20240516T173000
DTSTAMP:20260429T224518
CREATED:20240509T162622Z
LAST-MODIFIED:20240509T162622Z
UID:16286-1715876100-1715880600@math.bas.bg
SUMMARY:Семинар "Математически основи на информатиката" във Велико Търново
DESCRIPTION:На 16 май (четвъртък) от 16:15 часа в зала 502 на ФМИ\, ВТУ предстои поредната сбирка на семинара\nМатематически основи на информатиката. \nДоклад на тема \nLee distance in analyzing and modeling rank data\nще изнесе Николай И. Николов\, главен асистент в секция ИОВС на ИМИ. \nРезюме: Distances on permutations are commonly used in rank data analysis and are an efficient tool for constructing probability models for rankings. In this talk\, we consider some probabilistic applications of the Lee distance\, which was originally developed as a generalization of the Hamming distance for error correction coding in modulation. In particular\, we study the “K-means” clustering procedure based on Lee distance and approximate the normalizing constant needed for assessing the number of clusters. Furthermore\, several asymptotic properties of the random variable induced by the Lee distance are derived and applied to distance-based models for rank data. By making use of the optimal property of the Mallows model in terms of the Kullback-Leibler divergence\, a generalization based on the Cressie-Read power divergence is proposed. \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%b8-%d0%be%d1%81%d0%bd%d0%be%d0%b2%d0%b8-%d0%bd%d0%b0-%d0%b8%d0%bd%d1%84%d0%be-4/
LOCATION:Великотърновски университет\, ул. "Теодосий Търновски" № 2\, Велико Търново\, 5005\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240515T160000
DTEND;TZID=Europe/Sofia:20240515T173000
DTSTAMP:20260429T224518
CREATED:20240513T072858Z
LAST-MODIFIED:20240513T072922Z
UID:16290-1715788800-1715794200@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 15 май 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nHyperbolic amoebas\n\nще изнесе Михаил Школников\, ИМИ – БАН. \n\n\n\nAbstract: Classical amoebas serve as a tool to study algebraic varieties and as one of the entry points to tropical geometry. The original definition involves a logarithmic projection of a subvariety of a complex algebraic torus\, which can be interpreted as forgetting the phase\, i.e. the arguments of complex numbers. In group-theoretic terms\, this projection map may be thought of as passing to the quotient by the maximal compact subgroup. Suppose one replaces the algebraic torus with a complex three-dimensional matrix group. In that case\, the analogous projection naturally has a three-dimensional hyperbolic space as its target\, and it still makes sense to consider images\, i.e. hyperbolic amoebas\, of complex algebraic varieties under this map. I will review some of the basic properties of hyperbolic amoebas\, extending a fascinating interplay between complex and hyperbolic geometries.Based on joint work with Grigory Mikhalkin. \n\n\nZoom link:\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
URL:https://math.bas.bg/event/copy-%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/
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:20240429T143000
DTEND;TZID=Europe/Sofia:20240429T160000
DTSTAMP:20260429T224518
CREATED:20240422T221650Z
LAST-MODIFIED:20240422T221722Z
UID:16250-1714401000-1714406400@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 29.04.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nДидактически моменти от последните десетилетия\nще изнесe \nпроф. Борислав Лазаров.
URL:https://math.bas.bg/event/copy-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d0%b4%d0%b0%d0%ba%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-2/
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:20240424T160000
DTEND;TZID=Europe/Sofia:20240424T173000
DTSTAMP:20260429T224518
CREATED:20240422T220816Z
LAST-MODIFIED:20240422T220816Z
UID:16246-1713974400-1713979800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 24 април 2024 г. от 16:00 ч. в зала 403: \nДоклад на тема \nGeneralised Plucker formula\n\nще изнесе Андрей Бенгуш-Ласние\, МЦМН. \n\n\nAbstract: In order to classify objects in singularity theory and algebraic geometry\, we define invariants associated to varieties or germs of singularities and hope to have enough tools to compute them easily. From classical projective duality\, for any variety \(X\)\, we can define a dual variety \(X∗\) and we call the class of \(X\) the degree of \(X∗\). Plücker’s formula allows one to compute this class for plane curves with a certain set of nodes\, cusps and tacnodes.\nWe will start our talk by recalling the general Bézout theorem and then present the Plücker-Teissier formula\, which generalises Plücker’s formula to hypersurfaces\, and we will sketch a method to generalise the approach to its proof to general complete intersections.\n\nZoom link:\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-13/
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:20240416T140000
DTEND;TZID=Europe/Sofia:20240416T153000
DTSTAMP:20260429T224518
CREATED:20240409T202136Z
LAST-MODIFIED:20240409T202136Z
UID:16180-1713276000-1713281400@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 16 април 2024 г. (сряда) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nConvergence Rate for Order 1 Markov Random Walks\nще изнесе \nПетър Гайдаров. \nАбстракт. We examine the limiting behaviour of an order 1 Markov random walk in R2\, i.e. a walk that remembers its previous step. Provided a certain symmetry of the Markovian condition\, under relatively mild conditions we prove convergence to a Brownian motion and bound the rate of convergence. Therefore\, an order 1 Markov condition is insufficient to alter the limiting behaviour of a random walk. \n\n 
URL:https://math.bas.bg/event/%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d1%81%d1%82%d0%be%d1%85%d0%b0%d1%81%d1%82%d0%b8%d0%ba%d0%b0-41/
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:20240412T130000
DTEND;TZID=Europe/Sofia:20240412T143000
DTSTAMP:20260429T224518
CREATED:20240409T201342Z
LAST-MODIFIED:20240409T201619Z
UID:16175-1712926800-1712932200@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 12 април 2024 г. (петък) от 13:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nOn an Aspect of Second Quantum Revolution\nще изнесе \nВалентин Илиев\, ИМИ – БАН. \nАбстракт. The 2022 Nobel Prize in Physics has been awarded to Alain Aspect\, John Clauser\, and Anton Zeilinger for their work in Quantum Theory. Mass media called this event part of second quantum revolution which includes mainly quantum computing and other super-technologies. Here we discuss Alain Aspect’s version of Einstein-Podolsky-Rosen thought experiment and show that there exists an internal dependence of the simultaneous measurements made by the two pairs of linear polarizers operated in each leg of the apparatus during this experiment. The corresponding Shannon-Kolmogorov information flow (or\, noise?) linking a polarizer from one leg to a polarizer from the other leg is proportional to the absolute value of this function of dependence. It turns out that if Bell’s inequality is violated\, then the experiment performed at one leg is informationally dependent on the experiment at the other leg. \nЛинк към Zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \n\n\n\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%b0-113/
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:20240410T141500
DTEND;TZID=Europe/Sofia:20240410T160000
DTSTAMP:20260429T224518
CREATED:20240410T092757Z
LAST-MODIFIED:20240410T092757Z
UID:16184-1712758500-1712764800@math.bas.bg
SUMMARY:Семинар "Диференциални уравнения и математическа физика"
DESCRIPTION:На 10.04.2024 г. от 14:15 в зала 478 на ИМИ\nще се състои поредната сбирка на\nсеминара по Диференциални уравнения и математическа физика.\nДоклад на тема \nCHEMICAL COMPOSITION OF THE SUN DISK AND OF THE STARS’ DISKS. EVOLUTION OF THE STARS. BINARY SYSTEMS. GEOMAGNETIC STORMS. SATELLITES. SOLAR-TERRESTIAL INVESTIGATION AND SOLAR WIND. AIRPLANES AND HELICOPTERS\nще изнесе Емилиан Атанасов. \nВсички интересуващи се са добре дошли
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d1%84%d0%b5%d1%80%d0%b5%d0%bd%d1%86%d0%b8%d0%b0%d0%bb%d0%bd%d0%b8-%d1%83%d1%80%d0%b0%d0%b2%d0%bd%d0%b5%d0%bd%d0%b8%d1%8f-%d0%b8-%d0%bc%d0%b0-3/
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%94%D0%B8%D1%84%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8%20%D1%83%D1%80%D0%B0%D0%B2%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F%20%D0%B8%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%20%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0":MAILTO:seminar_differential_equations@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240329T130000
DTEND;TZID=Europe/Sofia:20240329T143000
DTSTAMP:20260429T224518
CREATED:20240326T074049Z
LAST-MODIFIED:20240326T074049Z
UID:16107-1711717200-1711722600@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 29 март 2024 г. (петък) от 13:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nGeneralized Definability of Discrete Time Interval-based Temporal Connectives\nще изнесе \nДимитър Гелев\, ИМИ – БАН. \nАбстракт. In Linear Temporal Logic with past (PLTL)\, expressive completeness implies that any first-order definable connective is also definable in the temporal language based on the Since and Until temporal operators. This is not the case about discrete time interval-based temporal logics with state-based semantics for the propositional variables. In this talk I prove the next best thing about the extension ITLNL of Moszkowski’s discrete time propositional Interval Temporal Logic (ITL) by the neighbourhood modalities: given an interval-based connective # which admits a first-order definition\, a star-free ITLNL defining formula for #(A1\,…\,Am) can be produced that is built from the past\, future and introspective formulas appearing in some separated equivalents of the operands A1\,…\,Am. The proof is based in an interval-based analogue of Gabbay’s separation theorem about PLTL that was previously established about ITLNL by the neighbourhood modalities by me and Moszkowski and have now used to prove the expressive completeness of ITLNL. As a side result I have come upon new proofs of expressive completeness and temporal separation for ITLNL’s star-free subset that I will briefly discuss too. \nЛинк към Zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \n\n\n\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%b0-112/
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:20240327T160000
DTEND;TZID=Europe/Sofia:20240327T173000
DTSTAMP:20260429T224518
CREATED:20240326T081032Z
LAST-MODIFIED:20240326T081032Z
UID:16111-1711555200-1711560600@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 27 март 2024 г. от 16:00 ч. в зала 403: \nДоклад на тема \nReading seminar of geometric Lubin-Tate theory\n\nще изнесе Jiachang Xu\, ИМИ – БАН. \n\n\nAbstract: This is reading seminar of geometry of Lubin-Tate theory\, our goal is to understand the papers “M. J. Hopkins and B. H. Gross\, Equivariant vector bundles on the Lubin-Tate moduli space” and “Ramero\, Lorenzo On a class of étale analytic sheaves”. The first seminar we plan to go over the basis of deformation theory\, formal group and necessary rigid geometry.\n\nZoom link:\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-12/
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:20240327T160000
DTEND;TZID=Europe/Sofia:20240327T173000
DTSTAMP:20260429T224518
CREATED:20240325T222412Z
LAST-MODIFIED:20240325T222412Z
UID:16094-1711555200-1711560600@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:On constructions of spherical codes\nДокладчик: д-р Константин Воробьов\, ИМИ – БАН\nДата: 27.03.2024 г.\nЧас: 16:00 ч.\nМясто: зала 503 \nРезюме: In this talk\, we review various approaches to construct spherical codes with a given coding distance. We also propose a new approach that allows us to find new codes on spheres in small dimensions. In particular\, we find a previously unknown kissing arrangement of 40 spheres in R^5. \n 
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%bf%d1%80%d0%b8%d0%bb%d0%be%d0%b6%d0%bd%d0%b0-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0-9/
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:20240322T130000
DTEND;TZID=Europe/Sofia:20240322T143000
DTSTAMP:20260429T224518
CREATED:20240315T082836Z
LAST-MODIFIED:20240315T082836Z
UID:16071-1711112400-1711117800@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 22 март 2024 г. (петък) от 13:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nOn the uniqueness of maximal solvable extensions of nilpotent Lie algebras\nще изнесе \nBakhrom A. Omirov (Harbin Institute of Technologies\, Harbin\, China and Romanovskiy Institute of Mathematics\, Uzbekistan Academy of Sciences\, Uzbekistan). \nАбстракт. During the talk it will be shown that under certain condition an arbitrary complex finite-dimensional maximal extension of a nilpotent Lie algebra N is isomorphic to the semidirect sum of N and its maximal torus. A criterion of the completeness for a finite-dimensional solvable Lie algebra is established. Comparisons with some existing results will also be discussed. \nЛинк към Zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \n\n\n\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%b0-111/
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:20240320T160000
DTEND;TZID=Europe/Sofia:20240320T173000
DTSTAMP:20260429T224518
CREATED:20240315T080032Z
LAST-MODIFIED:20240315T080032Z
UID:16056-1710950400-1710955800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 20 март 2024 г. от 16:00 ч. в зала 403: \nДоклад на тема \nEllipsoid superpotentials: obstructing symplectic embeddings by singular algebraic curves\n\nще изнесе Григори Михалкин\, Женевски университет. \n\n\nAbstract: How singular can be a local branch of a plane algebraic curve of a given degree d? A remarkable series of real algebraic curves was constructed by Stepan Orevkov. It is based on even-indexed numbers in the Fibonacci series: a degree 5 curve with a 13/2 cusp\, a degree 13 curve with a 34/5-cusp\, and so on. We discuss this and other series of algebraic curves in the context of the problem of symplectic packing of an ellipsoid into a ball\, with the answer given by the spectacular Fibonacci staircase of McDuff and Schlenk. The aspect ratio a>1 of the ellipsoid can be viewed as a real parameter for a certain enumerative superpotential function\, which is mostly locally constant\, but jumps at certain specific rational values (responsible for the aspects of cusp singularities). Based on joint work with Kyler Siegel.\n\nТова заседание на семинара няма да се излъчва в Zoom.
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-11/
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