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X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240108T130000
DTEND;TZID=Europe/Sofia:20240108T143000
DTSTAMP:20260504T033524
CREATED:20240104T180400Z
LAST-MODIFIED:20240104T180400Z
UID:15799-1704718800-1704724200@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 8 януари 2024 г. (понеделник) от 13:00 часа в зала 578 на ИМИ-БАН и онлайн чрез платформата zoom ще се проведе хибридно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nOn the exceptional series and its siblings\nще изнесе \nBruce Westbury (retired from University of Warwick\, UK). \nАбстракт. The exceptional series is the following series of eight simple Lie algebras: \nA1\, A2\, G2\, D4\, F4\, E6\, E7\, E8 \nConsider each Lie algebra\, g\, as a representation of the group Aut(g). Then the centraliser algebras of the first five tensor powers of g have common structure. First\, they have the same branching rules. We introduce a parameter so that the exceptional series is a set of eight points on a line. Then the values of the quadratic Casimir are linear functions of this parameter and the dimensions are rational functions of this parameter. \nThe exceptional series is one row in the Freudenthal magic square and all the preferred representations for each row also have analogous common structure. These series are lines. I will give a broad context for this common structure. \nThere is a plane which contains the first and fourth rows of the magic square and a three-dimensional space which contains the Vogel plane. \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%b0-109/
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:20240109T140000
DTEND;TZID=Europe/Sofia:20240109T153000
DTSTAMP:20260504T033524
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:20260504T033524
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:20240115T143000
DTEND;TZID=Europe/Sofia:20240115T160000
DTSTAMP:20260504T033524
CREATED:20240104T171018Z
LAST-MODIFIED:20240104T171018Z
UID:15785-1705329000-1705334400@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 15.01.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nМетодиката на Бхаскара “Гледай!”\nще изнесe \nпроф. Иван Тонов.
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%b5-35/
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:20260504T033524
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:20240117T160000
DTEND;TZID=Europe/Sofia:20240117T173000
DTSTAMP:20260504T033524
CREATED:20240112T124804Z
LAST-MODIFIED:20240112T124804Z
UID:15845-1705507200-1705512600@math.bas.bg
SUMMARY:Семинар "Математически основи на информатиката" във Велико Търново
DESCRIPTION:Сбирка на семинара “Математически основи на информатиката” ще се проведе във Велико Търново на 17 януари (сряда) от 16 часа в зала 502 на ФМИ – ВТУ. \nДоклад на тема \nBuild your own digital device\, even a multicore and multithreaded  icrocontroller with FPGA\nще изнесе Душан Биков\, Университет „Гоце Делчев“ – Щип. \nРезюме: The use of Field-Programmable Gate Arrays (FPGAs) plays an essential role in providing flexibility for digital design. We then delve into practical insights on utilizing and constructing Intellectual Property (IP) cores within the FPGA framework. \nIn addition to this\, a new type of multithreaded and multicore microcontroller will be presented. The aim is to provide more computing power for embedded applications. Through parallelism\, the microcontroller can run multiple tasks\, either independently or cooperatively. Parallelism is handled through multithreading\, which is better suited to real-time constraints than more traditional interruptions. The microcontroller Instruction Set Architecture (ISA) is the open-source RISC-V RV32I. A short efficiency experiment evaluation will be presented.
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-2/
LOCATION:Великотърновски университет\, ул. "Теодосий Търновски" № 2\, Велико Търново\, 5005\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240118T130000
DTEND;TZID=Europe/Sofia:20240118T143000
DTSTAMP:20260504T033524
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240119T153000
DTEND;TZID=Europe/Sofia:20240119T163000
DTSTAMP:20260504T033524
CREATED:20240111T141358Z
LAST-MODIFIED:20240112T121038Z
UID:15825-1705678200-1705681800@math.bas.bg
SUMMARY:Встъпителна лекция на проф. дн. Петър В. Данчев
DESCRIPTION:На 19.01.2024 г.\, петък\, от 15:30 часа\, в Зала 503 на ИМИ-БАН \nще се състои встъпителната лекция на проф. дн. Петър Василев Данчев на тема:\nРазлагане на матрици над произволно поле като сума на периодични матрици и нилпотентни матрици от ред 2\n  \n  \n 
URL:https://math.bas.bg/event/%d0%b2%d1%81%d1%82%d1%8a%d0%bf%d0%b8%d1%82%d0%b5%d0%bb%d0%bd%d0%b0-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bf%d1%80%d0%be%d1%84-%d0%b4%d0%bd-%d0%bf%d0%b5%d1%82%d1%8a%d1%80-%d0%b2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
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:20240122T130000
DTEND;TZID=Europe/Sofia:20240122T143000
DTSTAMP:20260504T033524
CREATED:20240116T104945Z
LAST-MODIFIED:20240116T105552Z
UID:15851-1705928400-1705933800@math.bas.bg
SUMMARY:Встъпителна лекция на доц. Стою Баров
DESCRIPTION:На 22 януари 2024 г. (понеделник) от 13:00 ч. в зала 478 на ИМИ-БАН \nдоц. Стою Баров ще изнесе встъпителна академична лекция на тема: \nВърху затворени множества с изпъкнали проекции в  сепарабелни Хилбертови пространства\nАбстракт:  Дискутират се затворени множества в \(R^n\) и в Хилбертово пространство \(l^2\)\, които имат изпъкнали проекции върху всички хиперравнини. Наред с други теореми\, показваме че ако \(C\) е затворено и неизпъкнало подмножество на \(l^2\)\, такова че затворените обвивки на проекциите върху всички хиперравнини са изпъкнали и съществени\, то тогава \(C\) съдържа затворено топологично копие на \(l^2\).
URL:https://math.bas.bg/event/%d0%b2%d1%81%d1%82%d1%8a%d0%bf%d0%b8%d1%82%d0%b5%d0%bb%d0%bd%d0%b0-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%b4%d0%be%d1%86-%d1%81%d1%82%d0%be%d1%8e-%d0%b1%d0%b0%d1%80%d0%be%d0%b2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%90%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7%2C%20%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F%20%D0%B8%20%D1%82%D0%BE%D0%BF%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F":MAILTO:vmil@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240123T140000
DTEND;TZID=Europe/Sofia:20240123T153000
DTSTAMP:20260504T033524
CREATED:20240122T075853Z
LAST-MODIFIED:20240122T075853Z
UID:15863-1706018400-1706023800@math.bas.bg
SUMMARY:Общ семинар на секция "Анализ\, геометрия и топология"
DESCRIPTION:Поредното заседание на Общия семинар на секция “Анализ\, геометрия и топология” ще се проведе\nна 23 януари 2024 г. от 14:00 часа в зала 478 на ИМИ – БАН.\nДоклад на тема: \nComplex Dirac structures on flag manifolds\nще изнесе Carlos Augusto Bassani Varea\, Universidade Tecnológica Federal do Paraná\, Brazil. \nПоканват се всички интересуващи се. \nРезюме. In this talk we present a description of the invariant complex Dirac structures with constant real index on a maximal flag manifold in terms of the roots of the Lie algebra which defines the flag manifold. As a particular case\, when the real index is zero\, we have the description of all invariant generalized complex structures on a maximal flag manifold. We also present a classification of the complex Dirac structures under the action of B-transformation. This is a joint work with Cristian Ortiz (IME-USP). \n\n 
URL:https://math.bas.bg/event/%d0%be%d0%b1%d1%89-%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%b0%d0%bd%d0%b0%d0%bb%d0%b8%d0%b7-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8-22/
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%BD%D0%B0%D0%BB%D0%B8%D0%B7%2C%20%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F%20%D0%B8%20%D1%82%D0%BE%D0%BF%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F":MAILTO:vmil@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240124T110000
DTEND;TZID=Europe/Sofia:20240124T130000
DTSTAMP:20260504T033524
CREATED:20240111T134913Z
LAST-MODIFIED:20240111T134913Z
UID:15821-1706094000-1706101200@math.bas.bg
SUMMARY:Общо събрание на учените и НС на ИМИ–БАН
DESCRIPTION:Съгласно т. 4.2 от Правилника  за дейността на ИМИ\,  \nна 24.01.2024 г. (сряда) от 11:00 часа в зала 055 “Акад. Стефан Додунеков”\, етаж -1 на ИМИ\, \nще се проведе съвместно заседание на Общото събрание на учените в ИМИ и на Научния съвет на ИМИ при следния дневен ред:  \n1.Приемане на научноизследователския и финансовия отчет за дейността на ИМИ през 2023 година.  \n2. Разни.  \nЧленовете на ОСУ и НС на ИМИ са задължени да присъстват на събранието. Справка за членство в Общото събрание на учените в ИМИ може да бъде направена при Галя Стоянова\, стая 215 в ИМИ\, тел. 3819. Предложения за протоколчик\, участие в комисия за преброяване и промени в дневния ред на събранието се приемат също от Галя Стоянова. Председател на НС на ИМИ:  акад. дмн О. Мушкаров Председател на ОСУ в ИМИ:  проф. д-р Е. Попова 
URL:https://math.bas.bg/event/%d0%be%d0%b1%d1%89%d0%be-%d1%81%d1%8a%d0%b1%d1%80%d0%b0%d0%bd%d0%b8%d0%b5-%d0%bd%d0%b0-%d1%83%d1%87%d0%b5%d0%bd%d0%b8%d1%82%d0%b5-%d0%b8-%d0%bd%d1%81-%d0%bd%d0%b0-%d0%b8%d0%bc%d0%b8-%d0%b1/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Събрание
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:20240124T140000
DTEND;TZID=Europe/Sofia:20240124T153000
DTSTAMP:20260504T033524
CREATED:20240119T135717Z
LAST-MODIFIED:20240119T135717Z
UID:15859-1706104800-1706110200@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 24 януари 2024 г. (сряда) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nWave field source localization using antenna arrays as a statistical problem of multidimensional linear system parameter estimation\nще изнесе \nAlexander Varypaev (Национален институт по геофизика\, геодезия и география\, БАН). \nАбстракт. The problem of statistical estimation of the coordinates of wave field sources from observations masked by additive random noise is considered. A likelihood-based estimate of source parameters is proposed for an unknown deterministic source function and additive noise correlated in time and space. The property of this estimate to suppress spatially correlated noise is mathematically justified. A statistical justification for the currently popular and robust SRP-PHAT M-estimate of the unknown source parameter is provided. Using the method of independent Monte Carlo tests\, several M-estimates of source coordinates are compared for different additive noise properties. \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%b0-40/
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:20240124T160000
DTEND;TZID=Europe/Sofia:20240124T173000
DTSTAMP:20260504T033524
CREATED:20240122T092832Z
LAST-MODIFIED:20240122T092833Z
UID:15875-1706112000-1706117400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 24 януари 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nIntroduction to Derived Algebraic Geometry and deformation theory\n\nще изнесе Инди Чин\, ИМИ – БАН. \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-6/
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:20240129T143000
DTEND;TZID=Europe/Sofia:20240129T160000
DTSTAMP:20260504T033524
CREATED:20240123T102212Z
LAST-MODIFIED:20240123T102212Z
UID:15882-1706538600-1706544000@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 29.01.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nЛюбопитно за конструирането на „вечни календари“\nще изнесe \nдоц. Валентин Христов.
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%b5-36/
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:20240130T140000
DTEND;TZID=Europe/Sofia:20240130T153000
DTSTAMP:20260504T033524
CREATED:20240126T111458Z
LAST-MODIFIED:20240126T111458Z
UID:15887-1706623200-1706628600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 30.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Владимир Митанкин\, ИМИ – БАН \nДоклад: Density of Hasse failures for diagonal affine cubic surfaces \nДопълнителна информация: https://icms.bg/density-of-hasse-failures-for-diagonal-affine-cubic-surfaces-a-talk-by-vladimir-mitankin/ \nРезюме. А question of Mordell asks which integers are the sum of three cubes provided that there are no local obstructions to that. While Mordell’s question seems out of reach with the current machinery\, it is widely believed that every integer not congruent to 4 or 5 mod 9 is a sum of three integral cubes. If\, instead of the sum of three cubes\, a general ternary cubic is considered\, local conditions no longer suffice for solubility\, i.e. the integral Hasse principle may fail. In this talk we shall apply the integral version of the Brauer-Manin obstruction to construct the first examples of such failures not explained by local conditions in the setting of affine diagonal ternary cubics. We will then explore in three different natural ways how such failures are distributed across the family of affine diagonal ternary cubics. \nThis talk is based on a joint work with Harkaran Uppal and Julian Lyczak.
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-18/
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:20240131T150000
DTEND;TZID=Europe/Sofia:20240131T163000
DTSTAMP:20260504T033524
CREATED:20240131T143833Z
LAST-MODIFIED:20240131T143833Z
UID:15897-1706713200-1706718600@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:Temporal networks\, Tensors\, and applications to ML\nДокладчик: проф. Огнян Кунчев\, ИМИ – БАН\nДата: 31.01.2024 г.\nЧас: 15:00 ч.\nМясто: … \nРезюме: Recently\, temporal networks got an increasing interest\, related to their numerous applications in real-life data analysis. The temporal networks (more mathematically\, “graphs depending on time”) are a typical example of a Tensor – the adjacency matrix depends on several parameters and is a tensor (in the mathematical sense of the word). We present some recent results about the structure of the spectrum of the normalized Laplacian in the case of “slowly varying temporal networks”. The detailed structure of the spectrum gives rise of the notion of “constant block Jacobi model”\, which has closed-form solution for the spectrum and the eigenfunctions. This brings a reconsideration of the notion of Fiedler vector for temporal networks. Depending on the time\, some discussion about the recent history of Tensors (mathematical sense) and their application in ML may be presented. \nФейсбук страница на семинара: Семинар по Приложна математика \nСеминарът ще бъде излъчен и по Zoom:\nhttps://us02web.zoom.us/j/85916659659?pwd=dFQxaDdPaWVLbVNhcFcwdUxTZWhoQT09
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%b0-8/
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:20240131T160000
DTEND;TZID=Europe/Sofia:20240131T173000
DTSTAMP:20260504T033524
CREATED:20240130T125552Z
LAST-MODIFIED:20240130T125552Z
UID:15893-1706716800-1706722200@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 31 януари 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nDerived Deformation Theory and Formal Moduli Problem\n\nще изнесе Инди Чин\, МЦМН и ИМИ – БАН. \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09\n\nAbstract: Derived deformation theory studies the formal neighborhoods of moduli spaces. The classical work of Kodaira-Spencer on deformation of complex manifolds tells that the dg Lie algebra A^(0\,*)(X\,TX) controls the deformations of the complex manifold. The example illustrates the following general principle: A dg Lie algebra gives rise to a deformation functor by considering the  Maurer-Cartan elements of the dg Lie algebra tensoring with the maximal ideal of an Artin local ring. This idea is explored by many people\, including  Quillen\, Deligne\, Drinfeld\,  Kapranov and Kontesevich. Later\, Lurie and Pridham independently proved that the category of dg Lie algebra is indeed equivalent to the category of Formal Moduli problem. I will state their results and explain the idea of the proof.
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-7/
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
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