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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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TZID:Europe/Sofia
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DTSTART:20250330T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251010T130000
DTEND;TZID=Europe/Sofia:20251010T143000
DTSTAMP:20260405T024342
CREATED:20251006T201908Z
LAST-MODIFIED:20251006T201908Z
UID:18315-1760101200-1760106600@math.bas.bg
SUMMARY:Съвместно заседание на семинара "Алгебра и логика" и семинара на секция ДУМФ
DESCRIPTION:На 10 октомври 2025 г. (петък) от 13:00 часа в зала 578 на ИМИ-БАН и онлайн чрез платформата zoom ще се проведе съвместно заседание на семинара по Алгебра и логика и на семинара на секция “Диференциални уравнения и математическа физика”. \nДоклад на тема \nOn Z5 reduction of soliton equations related to sl(5) algebra\n ще изнесе \nВладимир Герджиков (ИМИ-БАН)\, \nсъвместна работа с Б. Костадинов (ИМИ-БАН)\, С. Мишев (НБУ) и А. Стефанов (ФМИ-СУ). \nРезюме: Recently a new approach to the integrable systems\, extending and generalizing the ISM was formulated. It is based on an effective parametrization of the Riemann-Hilbert problem\, which allows one to extend the class of Lax pairs and effectively derive only the corresponding NLEE as compatibility condition of two linear problems. This method is based on the possibility to treat the solution of the RHP as a fundamental analytic solution of the Lax pair\, and then to apply the dressing Zakharov-Shabat method for deriving the soliton solutions of the NLEE. The aim of the present paper is to extend Mikhailov Z5 reduction group to the parametrization of the Z5 RHP. The NLEE that we obtained are dispersionless. \n\nPublished in Journal of Physics: Conference Series\, Vol. 3002:(1)\, id. 012014\, 14 pp. \nЛинк към zoom-стаята на семинара:\nHttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nПоканват се всички желаещи да присъстват.\n\nОт секция „Алгебра и логика” на ИМИ – БАН\nHttps://www.math.bas.bg/algebra/seminarAiL/
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%b0%d0%bb%d0%b3%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:20251013T140000
DTEND;TZID=Europe/Sofia:20251013T173000
DTSTAMP:20260405T024342
CREATED:20251010T074008Z
LAST-MODIFIED:20251010T074008Z
UID:18323-1760364000-1760376600@math.bas.bg
SUMMARY:МЦМН: Миникурс "Theory of Atoms via Examples" - лекции 5 и 6
DESCRIPTION:Theory of Atoms via Examples\n\nThe Theory of Atoms is a recent formalism introduced by Katzarkov\, Kontsevich\, Pantev\, and Yu\, which aims to integrate classical Hodge theory with symplectic geometry\, seeking applications in birational geometry. \nTo properly understand it\, we must gather concepts from many areas of knowledge\, ranging from Gromov-Witten theory and enumerative algebraic geometry to classical and noncommutative Hodge theory. This series is designed to be an example-driven introduction\, providing the essential background needed to understand this new theory. \n\n\nProgramme:\nPlace: Room 403 (IMI – BAS) \nLectures 1 & 2: Gromov–Witten Theory\nThursday\, 18 September 2025\n10:30–12:00 & 14:30–16:00 \nLecture 3: Quantum Multiplication and Frobenius Algebras\nMonday\, 6 October 2025\n15:30–17:00 \nLecture 4: More on quantum multiplication\nWednesday\, 8 October 2025\n15:30–17:00 \nLecture 5: Hodge Structures\, Variation of Hodge Structures and Noncommutative Hodge Structures\nMonday\, 13 October 2025\n14:00–15:30 \nLecture 6: Variations of Noncommutative Hodge Structures\nMonday\, 13 October 2025\n16:00–17:30 \nLecture 7: F-bundles\nWednesday\, 15 October 2025\n15:30–17:00 \nLecture 8: Atoms\nFriday\, 17 October 2025\n14:00–15:00 \nLecture 9: Examples\nFriday\, 17 October 2025\nTime: 16:00–17:30 \n  \nBibliography:\n[1] W. Fulton and R. Pandharipande\, Notes on stable maps and quantum cohomology\, 1997. Available at arXiv:alg-geom/9608011. \n[2] L. Katzarkov\, M. Kontsevich\, and T. Pantev\, Hodge theoretic aspects of mirror symmetry\, in From Hodge theory to integrability and TQFT tt*-geometry\, Proc. Sympos. Pure Math.\, vol. 78\, Amer. Math. Soc.\, Providence\, RI\, 2008\, pp. 87–117. \n[3] L. Katzarkov\, M. Kontsevich\, T. Pantev\, and T. Yue Yu\, Birational invariants from Hodge structures and quantum multiplication\, 2025. Available at arXiv:2508.05105. \n\nZoom link\nhttps://us06web.zoom.us/j/81931262811?pwd=gZvpjUCJTDpl5dbZfMOJcp6mWQ05MM.1
URL:https://math.bas.bg/event/%d0%bc%d1%86%d0%bc%d0%bd-%d0%bc%d0%b8%d0%bd%d0%b8%d0%ba%d1%83%d1%80%d1%81-theory-of-atoms-via-examples-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d0%b8-5-%d0%b8-6/
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:20251015T150000
DTEND;TZID=Europe/Sofia:20251015T170000
DTSTAMP:20260405T024342
CREATED:20251006T195108Z
LAST-MODIFIED:20251006T195108Z
UID:18312-1760540400-1760547600@math.bas.bg
SUMMARY:Семинар по приложна математика
DESCRIPTION:Следващата сбирка на Семинара по приложна математика ще се проведе на 15.10 (сряда) от 15:00 в зала 503 на ИМИ-БАН. \nДоклад на тема \nStochastic scattering control of Walsh’s spider diffusion with optimal diffraction probability measure selected from its own local-time\nще изнесе Исаак Охави\, който работи в обалсти като стохастичен контрол\, стохастична оптимизация и частни диференциални уравнения. \nAbstract: In this talk\, we start by giving a short introduction on “classical” stochastic control theory and its connection with second order nonlinear PDE theory. Then\, we present Walsh’s spider diffusions living on a star-shaped network\, and explain how these processes are at the origin of new problems of stochastic scattering control. A main direction is to focus and understand precisely their behavior and local time at the vertex. Thereafter\, we will give the main ideas\, steps and mathematical directions that I have recently undertaken in order to finally be able to prove existence and weak uniqueness of a spider’s motion having a spinning measure depending on its own local time. \nThe stochastic control problem aims to understand how the spider particle is diffracted at the vertex. The key point is to use the new boundary condition at the junction point\, called: nonlinear local-time Kirchhoff’s boundary condition and the recent advances I have obtained in the analysis of nonlinear partial differential equations in the viscosity framework. \nReferences:  \n–Comparison principle for Walsh’s spider HJB equations with non linear local time Kirchhoff’s boundary transmission. Journal of Mathematical Analysis and Applications\, 547 (2)\, 2025. \n-Martingal problem for a Walsh’s spider diffusion with spinning measure selected from its own local time. Accepted January 2025. Electronic Journal of Probability\, Volume 30\, paper\nno 22\, 2025.\n-Well posedness of linear parabolic partial differential equations posed on a star-shaped network with local time Kirchhoff’s boundary condition at the vertex. Journal of Mathematical Analysis and Applications\, 537 (2)\, 2024. \n-Stochastic scattering control of spider diffusion governed by an optimal probability diffraction measure selected from its own local time. Submitted 2025\, Arxiv arXiv:2501.18057
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%b0-15/
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:20251015T153000
DTEND;TZID=Europe/Sofia:20251015T170000
DTSTAMP:20260405T024342
CREATED:20251010T074405Z
LAST-MODIFIED:20251010T074405Z
UID:18326-1760542200-1760547600@math.bas.bg
SUMMARY:МЦМН: Миникурс "Theory of Atoms via Examples" - лекция 7
DESCRIPTION:Theory of Atoms via Examples\n\nThe Theory of Atoms is a recent formalism introduced by Katzarkov\, Kontsevich\, Pantev\, and Yu\, which aims to integrate classical Hodge theory with symplectic geometry\, seeking applications in birational geometry. \nTo properly understand it\, we must gather concepts from many areas of knowledge\, ranging from Gromov-Witten theory and enumerative algebraic geometry to classical and noncommutative Hodge theory. This series is designed to be an example-driven introduction\, providing the essential background needed to understand this new theory. \n\n\nProgramme:\nPlace: Room 403 (IMI – BAS) \nLectures 1 & 2: Gromov–Witten Theory\nThursday\, 18 September 2025\n10:30–12:00 & 14:30–16:00 \nLecture 3: Quantum Multiplication and Frobenius Algebras\nMonday\, 6 October 2025\n15:30–17:00 \nLecture 4: More on quantum multiplication\nWednesday\, 8 October 2025\n15:30–17:00 \nLecture 5: Hodge Structures\, Variation of Hodge Structures and Noncommutative Hodge Structures\nMonday\, 13 October 2025\n14:00–15:30 \nLecture 6: Variations of Noncommutative Hodge Structures\nMonday\, 13 October 2025\n16:00–17:30 \nLecture 7: F-bundles\nWednesday\, 15 October 2025\n15:30–17:00 \nLecture 8: Atoms\nFriday\, 17 October 2025\n14:00–15:00 \nLecture 9: Examples\nFriday\, 17 October 2025\nTime: 16:00–17:30 \n  \nBibliography:\n[1] W. Fulton and R. Pandharipande\, Notes on stable maps and quantum cohomology\, 1997. Available at arXiv:alg-geom/9608011. \n[2] L. Katzarkov\, M. Kontsevich\, and T. Pantev\, Hodge theoretic aspects of mirror symmetry\, in From Hodge theory to integrability and TQFT tt*-geometry\, Proc. Sympos. Pure Math.\, vol. 78\, Amer. Math. Soc.\, Providence\, RI\, 2008\, pp. 87–117. \n[3] L. Katzarkov\, M. Kontsevich\, T. Pantev\, and T. Yue Yu\, Birational invariants from Hodge structures and quantum multiplication\, 2025. Available at arXiv:2508.05105. \n\nZoom link\nhttps://us06web.zoom.us/j/81931262811?pwd=gZvpjUCJTDpl5dbZfMOJcp6mWQ05MM.1
URL:https://math.bas.bg/event/%d0%bc%d1%86%d0%bc%d0%bd-%d0%bc%d0%b8%d0%bd%d0%b8%d0%ba%d1%83%d1%80%d1%81-theory-of-atoms-via-examples-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-7/
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:20251016T133000
DTEND;TZID=Europe/Sofia:20251016T173000
DTSTAMP:20260405T024342
CREATED:20251016T084322Z
LAST-MODIFIED:20251016T101527Z
UID:18343-1760621400-1760635800@math.bas.bg
SUMMARY:Уъркшоп Codes\, Orthogonal Arrays\, and Related Areas
DESCRIPTION:Workshop on Codes\, Orthogonal Arrays\, and Related Areas\n  \nOne-day workshop on “Codes\, Orthogonal Arrays\, and Related Areas” will be held at Sabancı University\, Türkiye. The event aims to bring together researchers working on coding theory\, combinatorial designs\, and related algebraic structures to discuss recent developments and explore potential collaborations. \nOrganizers: \n\nPeter Boyvalenkov (Institute of Mathematics and Informatics\, Bulgarian Academy of Sciences\, Bulgaria)\nFerruh Özbudak (Sabancı University\, Türkiye)\n\nProgram \n13:40 – 14:30\nStefka Bouyuklieva (Veliko Tarnovo University\, Bulgaria)\n“Linear codes over a finite field with a given permutation automorphism” \n14:40 – 15:30\nMaryam Bajalan (Institute of Mathematics and Informatics\, Bulgarian Academy of Sciences\, Bulgaria)\n“Codes over rings\, with emphasis on polycyclic codes” \n15:30 – 15:50\nCoffee Break \n15:50 – 16:20\nIliya Bouyukliev (Institute of Mathematics and Informatics\, Bulgarian Academy of Sciences\, Bulgaria)\n“A software program for the equivalence of linear codes over finite fields and some applications” \n16:30 – 17:00\nPeter Boyvalenkov (Institute of Mathematics and Informatics\, Bulgarian Academy of Sciences\, Bulgaria)\n“On covering radius of orthogonal arrays of even strength” \n17:10 – 17:30\nFerruh Özbudak (Sabancı University\, Türkiye)\n“An Introduction to the Covering Radius of Codes” \n  \nParticipation\nParticipation is free of charge and open to all interested researchers and graduate students.\nFor further information\, please contact: ferruh.ozbudak@sabanciuniv.edu \n  \nJoin Zoom Meeting\nhttps://sabanciuniv.zoom.us/j/96801600679?pwd=amp5OENCM0dHOC9qd1NlOHJRM3dCQT09 \nMeeting ID: 968 0160 0679\nPasscode: 783038
URL:https://math.bas.bg/event/%d1%83%d1%8a%d1%80%d0%ba%d1%88%d0%be%d0%bf-codes-orthogonal-arrays-and-related-areas/
LOCATION:онлайн
CATEGORIES:Уъркшоп
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251017T140000
DTEND;TZID=Europe/Sofia:20251017T173000
DTSTAMP:20260405T024342
CREATED:20251010T075101Z
LAST-MODIFIED:20251010T075101Z
UID:18331-1760709600-1760722200@math.bas.bg
SUMMARY:МЦМН: Миникурс "Theory of Atoms via Examples" - лекции 8 и 9
DESCRIPTION:Theory of Atoms via Examples\n\nThe Theory of Atoms is a recent formalism introduced by Katzarkov\, Kontsevich\, Pantev\, and Yu\, which aims to integrate classical Hodge theory with symplectic geometry\, seeking applications in birational geometry. \nTo properly understand it\, we must gather concepts from many areas of knowledge\, ranging from Gromov-Witten theory and enumerative algebraic geometry to classical and noncommutative Hodge theory. This series is designed to be an example-driven introduction\, providing the essential background needed to understand this new theory. \n\n\nProgramme:\nPlace: Room 403 (IMI – BAS) \nLectures 1 & 2: Gromov–Witten Theory\nThursday\, 18 September 2025\n10:30–12:00 & 14:30–16:00 \nLecture 3: Quantum Multiplication and Frobenius Algebras\nMonday\, 6 October 2025\n15:30–17:00 \nLecture 4: More on quantum multiplication\nWednesday\, 8 October 2025\n15:30–17:00 \nLecture 5: Hodge Structures\, Variation of Hodge Structures and Noncommutative Hodge Structures\nMonday\, 13 October 2025\n14:00–15:30 \nLecture 6: Variations of Noncommutative Hodge Structures\nMonday\, 13 October 2025\n16:00–17:30 \nLecture 7: F-bundles\nWednesday\, 15 October 2025\n15:30–17:00 \nLecture 8: Atoms\nFriday\, 17 October 2025\n14:00–15:00 \nLecture 9: Examples\nFriday\, 17 October 2025\nTime: 16:00–17:30 \n  \nBibliography:\n[1] W. Fulton and R. Pandharipande\, Notes on stable maps and quantum cohomology\, 1997. Available at arXiv:alg-geom/9608011. \n[2] L. Katzarkov\, M. Kontsevich\, and T. Pantev\, Hodge theoretic aspects of mirror symmetry\, in From Hodge theory to integrability and TQFT tt*-geometry\, Proc. Sympos. Pure Math.\, vol. 78\, Amer. Math. Soc.\, Providence\, RI\, 2008\, pp. 87–117. \n[3] L. Katzarkov\, M. Kontsevich\, T. Pantev\, and T. Yue Yu\, Birational invariants from Hodge structures and quantum multiplication\, 2025. Available at arXiv:2508.05105. \n\nZoom link\nhttps://us06web.zoom.us/j/81931262811?pwd=gZvpjUCJTDpl5dbZfMOJcp6mWQ05MM.1
URL:https://math.bas.bg/event/%d0%bc%d1%86%d0%bc%d0%bd-%d0%bc%d0%b8%d0%bd%d0%b8%d0%ba%d1%83%d1%80%d1%81-theory-of-atoms-via-examples-%d0%bb%d0%b5%d0%ba%d1%86%d0%b8%d0%b8-8-%d0%b8-9/
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:20251020T140000
DTEND;TZID=Europe/Sofia:20251020T153000
DTSTAMP:20260405T024342
CREATED:20251015T182437Z
LAST-MODIFIED:20251015T182437Z
UID:18339-1760968800-1760974200@math.bas.bg
SUMMARY:Семинар по особености
DESCRIPTION:Дата и час: 20.10.2025 г.\, 14:00 ч.\nМясто: Зала 578\, ИМИ – БАН \nЗаглавие на доклада: \nThe complete intersection discrepancy of curves\nДокладчик: Andrei Bengus-Lasnier (ИМИ – БАН) \nРезюме: In this talk I will introduce an invariant for reduced curves called the complete intersection discrepancy (cid for short). This numerical quantity arose naturally when trying to generalize known formulas for complete intersection curves to general curves. The cid then serves as a correction term in these formulas. \nI will present some of the cid’s basic properties and derive two formulas. The first relates basic invariants such as Milnor number\, its multiplicity and the multiplicity of its Jacobian ideal\, and generalizes a well-known result in singularity theory due to Lê\, Greuel and Teissier. The second formula is a generalization of the genus-degree formula for projective curves.\n\nThis work is in collaboration with Antoni Rangachev and Terence Gaffney.
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%be%d1%81%d0%be%d0%b1%d0%b5%d0%bd%d0%be%d1%81%d1%82%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:20251024T090000
DTEND;TZID=Europe/Sofia:20251024T153000
DTSTAMP:20260405T024342
CREATED:20251021T134328Z
LAST-MODIFIED:20251021T134713Z
UID:18361-1761296400-1761319800@math.bas.bg
SUMMARY:Ден на отворените врати в КЛаДА-БГ  
DESCRIPTION:На 24.10.2025 г. от 9:00 до 15:30 в зала „Проф. Марин Дринов“ в сградата на БАН-Администрация (гр. София\, ул. „15 ноември” № 1) ще се проведе Ден на отворените врати на изследователската „Е-инфраструктура за ресурси и технологии за българското езиково и културно наследство\, интегрирана в рамките на европейските инфраструктури CLARIN и DARIAH“ (КЛаДА-БГ). \nПроф. д-р Десислава Панева-Маринова от Институт по математика и информатика БАН ще представи иновативната разработка CultIS (https://cultis.math.bas.bg/\, софтуерна платформа за интелигентно цифрово управление и представяне на големи масиви от данни и знания от хуманитаристиката и социалните науки) и нейни внедрявания. \nВнедрявания са направени за нуждите на народна библиотека „Иван Вазов“ – Пловдив\, регионална библиотека „Пейо Яворов“ – Бургас\, Централна библиотека на БАН и др. \nПРОГРАМА на Ден на отворените врати КЛаДА БГ 2025
URL:https://math.bas.bg/event/%d0%b4%d0%b5%d0%bd-%d0%bd%d0%b0-%d0%be%d1%82%d0%b2%d0%be%d1%80%d0%b5%d0%bd%d0%b8%d1%82%d0%b5-%d0%b2%d1%80%d0%b0%d1%82%d0%b8-%d0%b2-%d0%ba%d0%bb%d0%b0%d0%b4%d0%b0-%d0%b1%d0%b3/
LOCATION:Българска академия на науките\, ул. „15 ноември“ №1\, София\, София-град\, 1040\, Bulgaria
CATEGORIES:Ден на отворените врати
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251026T093000
DTEND;TZID=Europe/Sofia:20251026T130000
DTSTAMP:20260405T024342
CREATED:20251022T180841Z
LAST-MODIFIED:20251022T180841Z
UID:18384-1761471000-1761483600@math.bas.bg
SUMMARY:Лекция на проф. Марк Сол
DESCRIPTION:Среща с д-р Марк Sol (Mark Saul) в ИМИ-БАН \nНа 26 октомври т.г. ще имаме удоволствието да чуем лекцията на д-р Марк Сол на тема: \nПътища в графи: от мостовете на Кьонигсберг през секвенирането на протеини до рисунките „на един дъх“ на Пикасо \nКъде? – в Заседателната зала на ИМИ-БАН \nКакво – кога?  \n9:30-9:55 – регистрация \n10:00-11:00 Кратко приветствие и лекция \n11:15-12:00.  –  Представяне на добри STEAM практики от страна на учители във вид на Постерна сесия без постери и голям екран (макети\, компютърни разработки\, произведения на учениците ви). \n12:00-13:00 – Скромна почерпка и раздумка с д-р Сол \nД-р Марк Сол e изтъкнат преподавател\, директор на международната изследователска програма за ученици RSI в продължение на 10 години и директор на състезанията към Математическата асоциация на Америка.  Мнозина ученици на д-р Сол впоследствие са направили значими приноси в математиката и природните науки.
URL:https://math.bas.bg/event/%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%bc%d0%b0%d1%80%d0%ba-%d1%81%d0%be%d0%bb/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Лекция,Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251027T140000
DTEND;TZID=Europe/Sofia:20251027T153000
DTSTAMP:20260405T024342
CREATED:20251026T081914Z
LAST-MODIFIED:20251026T081914Z
UID:18392-1761573600-1761579000@math.bas.bg
SUMMARY:Семинар по особености
DESCRIPTION:Следващата сбирка на Семинара по особености ще се състои в понеделник (27.10) от 14:00 часа в зала 578. Д-р Ерик Паeмуру (ИМИ-БАН) ще изнесе доклад на тема \,\, Log canonical thresholds of reduced plane curves”. Абстрактът на неговия доклад е приложен по-долу.\n\nSpeaker:  Erik Paemurru (IMI-BAS)\nTitle: Log canonical thresholds of reduced plane curves\nAbstract: I will give an overview of normal forms of plane curve singularities and define the log canonical threshold. I will then compute log canonical thresholds of all reduced plane curve singularities of degree at most five and all reduced plane curve singularities of degree d and multiplicity d-1. This is based on the works https://arxiv.org/abs/2404.18238 and https://arxiv.org/abs/2508.21676
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%be%d1%81%d0%be%d0%b1%d0%b5%d0%bd%d0%be%d1%81%d1%82%d0%b8-2/
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:20251028T160000
DTEND;TZID=Europe/Sofia:20251028T190000
DTSTAMP:20260405T024342
CREATED:20251023T160003Z
LAST-MODIFIED:20251023T160209Z
UID:18387-1761667200-1761678000@math.bas.bg
SUMMARY:Нов курс "Sandpiles and Tropical Geometry"
DESCRIPTION:A new course on the interplay between abelian sandpiles (prototypical model of self-organized criticality) and tropical geometry (contemporary branch of mathematics) will start on October 28th:\nhttps://icms.bg/sandpiles-and-tropical-geometry-specialized-phd-course/\n\nThe meetings are planned to be from 16:00 to 19:00 (GMT+3) on most Tuesdays and Thursdays until the end of the year — with two hours of lectures followed by one hour of discussions/exercises.\n\nThe first two meetings are scheduled for 28th and 30th of October\, room 578 at IMI-BAS (the room may change in November) and Zoom (the link will remain the same):  https://us06web.zoom.us/j/86556797224?pwd=g1gjtRHFenzbgJ9s29kOo1nZQVqcoR.1\n\nThe meetings will not be recorded; however\, the notes will be made available at the website of the course.
URL:https://math.bas.bg/event/%d0%bc%d0%b8%d0%bd%d0%b8%d0%ba%d1%83%d1%80%d1%81-sandpiles-and-tropical-geometry/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251104
DTEND;VALUE=DATE:20251106
DTSTAMP:20260405T024342
CREATED:20251029T215011Z
LAST-MODIFIED:20251029T215011Z
UID:18402-1762214400-1762387199@math.bas.bg
SUMMARY:XV Международна конференция "Математика в информационното моделиране"
DESCRIPTION:На 4 и 5 ноември 2025 г.\, в зала 578 на ИМИ\, БАН ще се проведе \nXV Международна конференция “Математика в информационното моделиране”\, \nсъвместно с отчетната сесия на секция “Информационно моделиране”. \nПрограма на конференцията \nКонференцията ще бъде достъпна и в  Zoom на следния линк: \nhttps://us02web.zoom.us/j/82189891867?pwd=ERVhHO1b7sLckdoKIZdjICqnxrW9vK.1
URL:https://math.bas.bg/event/xv-%d0%bc%d0%b5%d0%b6%d0%b4%d1%83%d0%bd%d0%b0%d1%80%d0%be%d0%b4%d0%bd%d0%b0-%d0%ba%d0%be%d0%bd%d1%84%d0%b5%d1%80%d0%b5%d0%bd%d1%86%d0%b8%d1%8f-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%BD%D0%BE%20%D0%BC%D0%BE%D0%B4%D0%B5%D0%BB%D0%B8%D1%80%D0%B0%D0%BD%D0%B5%20%28%D0%92%D0%9D%D0%97%29":MAILTO:stoyan@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251104T130000
DTEND;TZID=Europe/Sofia:20251104T143000
DTSTAMP:20260405T024342
CREATED:20251031T130526Z
LAST-MODIFIED:20251031T131026Z
UID:18421-1762261200-1762266600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Семинар на МЦМН \nВторник\, 4.11.2025\, 13:00 ч.\, Зала 403\, ИМИ – БАН \nЛектор: Leonardo Cavenaghi (МЦМН\, ИМИ – БАН) \nТема на доклада: Exotic phenomena in topology and geometry \n  \nРезюме: This talk\, aimed at a general audience of mathematicians\, discusses very geometric models of exotic spheres. \nExotic spheres are manifolds homeomorphic to classical spheres but not diffeomorphic to them. We will outline some constructions via group actions and discuss their admissible geometries. For instance\, until this day\, it is not known whether an exotic sphere admits a metric of positive sectional curvature\, but some do not even admit positive scalar curvature. \nIn this talk\, we also outline how one can indirectly study their geometries\, aiming to gain a better understanding of their admissible geometries\, for example\, regarding the existence of Lorentzian metrics and the spectral problem. \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-38/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251104T140000
DTEND;TZID=Europe/Sofia:20251104T153000
DTSTAMP:20260405T024342
CREATED:20251028T184134Z
LAST-MODIFIED:20251028T184134Z
UID:18396-1762264800-1762270200@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 4 ноември 2025 г. (вторник) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nОптимално предсказване на екстремални събития\nще изнесе \nСтилян Стоев (University of Michigan). \nАбстракт \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%b0-44/
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:20251104T150000
DTEND;TZID=Europe/Sofia:20251104T163000
DTSTAMP:20260405T024342
CREATED:20251031T131955Z
LAST-MODIFIED:20251031T132014Z
UID:18427-1762268400-1762273800@math.bas.bg
SUMMARY:Семинар на МЦМН: Atom Theory
DESCRIPTION:Seminar Details\n\n\nSpeaker: Ludmil Katzarkov (ICMS\, IMI-BAS\, University of Miami)\n\n\nTitle: Recent Advancements in the Theory of Atoms\n\n\nDate & Time: Tuesday\, November 4\, 2025\, at 3:00 PM\n\n\nPlace (In-Person): Room 403\, IMI-BAS\n\n\nOnline Attendance (Zoom)\n\n\nZoom Link: https://us02web.zoom.us/j/86497450517?pwd=39OtfySJ4SbhKihr1IpaIz32dD7iBp.1\n\n\nMeeting ID: 864 9745 0517\n\n\nPasscode: 181023\n\n\nFor further information\, always keep track of our website:  https://icms.bg/research-groups/theory-of-atoms/
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-atom-theory/
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:20251105T140000
DTEND;TZID=Europe/Sofia:20251105T153000
DTSTAMP:20260405T024342
CREATED:20251031T115558Z
LAST-MODIFIED:20251031T122424Z
UID:18416-1762351200-1762356600@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН ще се състои в сряда\, 5 ноември\, от 14:00 ч. в зала 403 и онлайн в Zoom. \nДоклад на тема \nSpecial Linear Systems on Real Algebraic Curves\nще изнесе Turgay Akyar (ИМИ – БАН). \nДопълнителна информация можете да откриете на:\nhttps://icms.bg/special-linear-systems-on-real-algebraic-curves-geometry-seminar-talk-by-turgay-akyar/ \nZoom link:\n\nhttps://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1
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-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:20251110T100000
DTEND;TZID=Europe/Sofia:20251110T170000
DTSTAMP:20260405T024342
CREATED:20251106T094232Z
LAST-MODIFIED:20251106T094232Z
UID:18439-1762768800-1762794000@math.bas.bg
SUMMARY:Atanasoff Memorial Day
DESCRIPTION:На 10 ноември 2025 г. в Института по математика и информатика на БАН ще се проведе събитието Atanasoff Memorial Day – нова инициатива на Института по математика и информатика при Българската академия на науките и Международния център по математически науки (МЦМН-София) към ИМИ-БАН. Амбицията на организаторите е събитието да се провежда всяка година като по този начин се чества паметта на Джон Винсънт Атанасов (1903–1995) – компютърен пионер\, изобретател на модел на електронен цифров компютър и прославен като „Българинът – баща на електронния компютър“\, като се отбележи пресечната точка на математиката\, компютърните изчисления и науките за сложността – областите\, които обединяват топологията\, геометрията и машинното обучение през 21. век и свързват интелектуалното наследство на България със световните научни върхове в областта на математиката и изчисленията. \nВсяка година\, в програмата на Atanasoff Memorial Day ще се провежда серия от лекции – Atanasoff Memorial Lecture Series. Тазгодишната тема „Машинно обучение\, геометрия и топология в изучаването на комплексни системи“ ще разгледа взаимодействието между съвременните изчислителни методи и дълбоките геометрични структури. \nПрограма на събитието ще намерите тук.
URL:https://math.bas.bg/event/atanasoff-memorial-day/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Избрани,Конференция
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251111T140000
DTEND;TZID=Europe/Sofia:20251111T153000
DTSTAMP:20260405T024342
CREATED:20251106T173729Z
LAST-MODIFIED:20251106T173729Z
UID:18448-1762869600-1762875000@math.bas.bg
SUMMARY:Семинар по приложна математика
DESCRIPTION:Следващата сбирка на Семинара по приложна математика ще бъде на 11.11. (вторник) от 14:00 в ИМИ-БАН\, Зала 503. \nДокладчик: Хелмут Питърс (Манхайм\, Германия) \nЗаглавие: The number of cycles in a random permutation and the number of segregating sites jointly converge to the Brownian sheet \nРезюме: Consider a random permutation of {1\, …\, ⌊nᵗ²⌋} drawn according to the Ewens measure with parameter t₁\, and let K(n\, t) denote the number of its cycles\, where t ≡ (t₁\, t₂) ∈ [0\, 1]². Next\, consider a sample drawn from a large\, neutral population of haploid individuals subject to mutation under the infinitely many sites model of Kimura\, whose genealogy is governed by Kingman’s coalescent. Let S(n\, t) count the number of segregating sites in a sample of size ⌊nᵗ²⌋ when mutations arrive at rate t₁/2. Our main result comprises two different couplings of the above models for all parameters n ≥ 2 and t ∈ [0\, 1]²\, such that in both couplings one has weak convergence of processes as n → ∞ to a one-dimensional Brownian sheet. This generalizes and unifies a number of well-known results. \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%b0-16/
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:20251112T140000
DTEND;TZID=Europe/Sofia:20251112T153000
DTSTAMP:20260405T024342
CREATED:20251110T155429Z
LAST-MODIFIED:20251110T155429Z
UID:18495-1762956000-1762961400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Имаме удоволствието да обявим две лекции на тема \nТропически криви с приложения\nот \nПетър Петров (ИМИ-БАН)\, \nкойто ще говори на Семинара по геометрия на МЦМН от 14:00 часа следващите две среди (12 и 19 ноември) \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук:\nhttps://icms.bg/tropical-curves-with-applications-geometry-seminar-talk-by-petar-petrov/ \nВръзка към Zoom:\nhttps://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1
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-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:20251118T130000
DTEND;TZID=Europe/Sofia:20251118T153000
DTSTAMP:20260405T024342
CREATED:20251118T095857Z
LAST-MODIFIED:20251118T095857Z
UID:18584-1763470800-1763479800@math.bas.bg
SUMMARY:Съвместно заседание на Семинара по особености и Семинара на МЦМН
DESCRIPTION:Joint meeting of the Seminar on Singularities and the ICMS Seminar\, with a lecture by Pablo Cuadrado. The program is as follows.\n\nTuesday\, November 18\, room 403\, IMI-BAS.\n\n13:00 — Giovane Galindo (ICMS\, IMI-BAS)\nBundle-type sub-Riemannian structures on holonomy bundles\n\n14:00 — Pablo Portilla Cuadrado (Universidad Politécnica de Madrid)\nThe medial axis of the Milnor fiber\n\nAbstract (Galindo): In this talk we present the notion of Gromov-Hausdorff distance\, a novel field of study that aims to understand the topology of the moduli space of Riemannian metrics on a given manifold. We will then present new results on the subject concerning the collapse of principal bundles onto reductive homogeneous spaces.\n\nAbstract (Cuadrado): Let f(x\,y) define an isolated singularity at the origin. In this talk we explore a new flat metric induced on the Milnor fiber of f by the associated complex Hamiltonian vector field. With the help of this metric we can define a spine on each Milnor fiber via the classical method of the medial axis. This spine depends on the choice of boundary for the Milnor fiber. It is subanalytic and comes equipped with a retraction from the boundary onto it. We hope to understand the geometry of the versal unfolding space via these spines. This ongoing joint work with Norbert A’Campo.
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%bf%d0%be-%d0%be%d1%81/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251119T140000
DTEND;TZID=Europe/Sofia:20251119T153000
DTSTAMP:20260405T024342
CREATED:20251110T155551Z
LAST-MODIFIED:20251110T155551Z
UID:18498-1763560800-1763566200@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Имаме удоволствието да обявим две лекции на тема \nТропически криви с приложения\nот \nПетър Петров (ИМИ-БАН)\, \nкойто ще говори на Семинара по геометрия на МЦМН от 14:00 часа следващите две среди (12 и 19 ноември) \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук:\nhttps://icms.bg/tropical-curves-with-applications-geometry-seminar-talk-by-petar-petrov/ \nВръзка към Zoom:\nhttps://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1
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-19/
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:20251120T161500
DTEND;TZID=Europe/Sofia:20251120T173000
DTSTAMP:20260405T024342
CREATED:20251106T103707Z
LAST-MODIFIED:20251118T100147Z
UID:18442-1763655300-1763659800@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 20 ноември 2025 г. (сряда)  от 16:15 часа в Заседателната зала на ИМИ – БАН. Доклад на тема:\n\nИнтерполационна задача на Биркхоф: стари и нови резултати\nще изнесе проф. д.н. Гено Николов\,\nФакултет по матем​атика и информатика\, Софийски университет „Св. Климент Охридски“. \n\n\n\nРезюме. През 1906 г. американският математик Джордж Дейвид Биркхоф формулира една задача за интерполиране с алгебрични полиноми. Тази задача се задава с матрици на инцидентност и включва като частни случаи класическите интерполационни задачи на Лагранж и Ермит. За разлика от тях\, общата интерполационна задача на Биркхоф не винаги е разрешима. Въпреки че е изследван от много и изтъкнати математици\, проблемът за характеризацията на регулярните матрици на инцидентност (т.е.\, задаващи интерполационна задача на Биркхоф с единствено решение) към днешна дата стои открит.В доклада си ще разкажа за някои получени напоследък класове от регулярни матрици на инцидентност и ще припомня някои не толкова известни по-стари резултати касаещи Биркхофската интерполация.
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%b0-2/
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251124T140000
DTEND;TZID=Europe/Sofia:20251124T153000
DTSTAMP:20260405T024342
CREATED:20251118T100923Z
LAST-MODIFIED:20251118T100923Z
UID:18589-1763992800-1763998200@math.bas.bg
SUMMARY:Семинар на секция ММЧА
DESCRIPTION:Поредната сбирка на семинара на секция\n\nМатематическо моделиране и числен анализ\n\nще се състои на 24.11.2025 г.\, понеделник\, от 14:00 часа в зала 503 на Института по математика и информатика.\n\nДоклад на тема\n \nModelling financial crisis propagation as an epidemic on multiplex networks\n\nще изнесе\n\nд-р Малвина Божидарова (Russell Group Limited)\n\nРезюме: We propose a novel framework for modelling the spread of financial crises in complex networks\, combining financial data\, Extreme Value Theory and an epidemiological transmission model. We accommodate two key aspects of contagion modelling: fundamentals-based contagion\, where the transmission is due to direct financial linkages\, and pure contagion\, where a crisis might trigger additional crises due to global effects. We use stock price\, geographical location and economic sector data for a set of companies to construct multiplex networks of four layers\, on which a Susceptible-Infected-Recovered transmission model is defined\, in order to model the spread of financial shocks between companies by accounting for their interconnected nature. By utilizing stock price data for the 2008 and 2020 financial crises\, we investigate and assess the effectiveness of our model in forecasting the propagation of financial shocks through the network\, where a shock is detected by measuring stock price volatility. The results suggest that the proposed framework is effective in predicting the spread of financial crises. Our findings demonstrate the significance of each layer of the multiplex network structure\, which differentiates between various transmission pathways\, for predicting the number of affected companies\, as well as for company-\, sector- or location-specific predictions.
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%bc%d1%87%d0%b0/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251125T130000
DTEND;TZID=Europe/Sofia:20251125T143000
DTSTAMP:20260405T024342
CREATED:20251121T194854Z
LAST-MODIFIED:20251121T195038Z
UID:18595-1764075600-1764081000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Вторник\, 25 ноември 2025 г.\, 13:00\, room 403\, IMI-BAS.\n\nDeepanshu Prasad (МЦМН\, ИМИ – БАН)\nAn Extension of Sato-Kimura Theorem for Semi-invariant rings\n\nРезюме: We give an analog of a result of Sato-Kimura in the context of a semi-invariant  ring for a finite dimensional algebra over an algebraically closed field K of characteristics 0. Then\, we examine the case of finite dimensional hereditary algebras over K. This is joint work with Charles Paquette and David Wehlau. \n\nAn Extension of Sato-Kimura Theorem for Semi-invariant rings\, ICMS seminar talk by Deepanshu Prasad
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-39/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251126T160000
DTEND;TZID=Europe/Sofia:20251126T173000
DTSTAMP:20260405T024342
CREATED:20251121T195900Z
LAST-MODIFIED:20251126T094131Z
UID:18602-1764172800-1764178200@math.bas.bg
SUMMARY:Съвместно заседание на семинара на МЦМН и семинара на секция МОИ
DESCRIPTION:26 ноември 2025 г.\, сряда\, от 16:00 ч. в Зала 403 на ИМИ – БАН. \nСъвместно заседание на Семинара на МЦМН и Семинара на секция Математически основи на информатиката \nFrank Vallentin (Universität zu Köln) \nLeast distortion Euclidean embeddings of flat tori\nРезюме: In the emerging field of bi-Lipschitz invariant theory\, one studies embeddings of orbit spaces H/G (H a Hilbert space\, G a subgroup of its automorphisms) into simpler Hilbert spaces via distance-preserving maps up to a constant factor. \n\nIn this talk\, I present an infinite-dimensional semidefinite program that computes least-distortion embeddings of flat tori Rn/L\, where L is an n-dimensional lattice\, into Hilbert spaces. Using symmetry reduction techniques\, this infinite-dimensional semidefinite program reduces to an infinite-dimensional linear program. \nEven with this simplification\, solving the program remains challenging. By combining this approach with the linear programming bound for spherical designs\, combined with brute-force methods\, we finally are able to determine the least-distortion embeddings of Rn/Zn\, R2/A2\, and R8/E8. \n(Based on joint work with Arne Heimendahl\, Moritz Lücke\, Philippe Moustrou\, and Marc Christian Zimmermann) \n\nLeast distortion Euclidean embeddings of flat tori\, ICMS seminar talk by Frank Vallentin
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-%d0%bc%d1%86/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20251129
DTEND;VALUE=DATE:20251130
DTSTAMP:20260405T024342
CREATED:20251010T080844Z
LAST-MODIFIED:20251010T081254Z
UID:18335-1764374400-1764460799@math.bas.bg
SUMMARY:Национален семинар "Изследователският подход в математическото образование"
DESCRIPTION:Следващото издание на Националния семинар “Изследователският подход в математическото образование”  ще се проведе на 29 ноември 2025 г. \nСрокът за регистрация е 20 ноември 2025 г. \nЗа повече информация посетете сайта на семинара.
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%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%be%d0%b2%d0%b0%d1%82%d0%b5%d0%bb%d1%81%d0%ba%d0%b8-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251202T110000
DTEND;TZID=Europe/Sofia:20251202T170000
DTSTAMP:20260405T024342
CREATED:20251202T110824Z
LAST-MODIFIED:20251202T110824Z
UID:18626-1764673200-1764694800@math.bas.bg
SUMMARY:Годишна отчетна сесия на секция СофТИС
DESCRIPTION:Годишната отчетна сесия на секция  \n“Софтуерни технологии и информационни системи” \nще се проведе във вторник\, 2 декември\, в зала 278 от 11.00 ч.  \nПРОГРАМА
URL:https://math.bas.bg/event/%d0%b3%d0%be%d0%b4%d0%b8%d1%88%d0%bd%d0%b0-%d0%be%d1%82%d1%87%d0%b5%d1%82%d0%bd%d0%b0-%d1%81%d0%b5%d1%81%d0%b8%d1%8f-%d0%bd%d0%b0-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d1%81%d0%be%d1%84%d1%82%d0%b8-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251202T130000
DTEND;TZID=Europe/Sofia:20251202T160000
DTSTAMP:20260405T024342
CREATED:20251202T105711Z
LAST-MODIFIED:20251202T105711Z
UID:18623-1764680400-1764691200@math.bas.bg
SUMMARY:Семинар на МЦМН и съвместно заседание със семинара АГТ
DESCRIPTION:Следващото заседание на семинара на МЦМН ще се състои във вторник\, 2 декември 2025 г. Доклади ще изнесат Рой Маген от МЦМН и Ливиу Орнеа от Букурещския университет\, като вторият доклад е в рамките на съвместно заседание със семинара на секция “Анализ\, Геометрия и Топология”. Програмата е следната.\n\nICMS Seminar and AGT Seminar\n\nTuesday\, December 2nd\, room 403 IMI-BAS. \n\n\n13:00 — Roy Magen (ICMS\, IMI-BAS) \n\n Flavours of homotopy theory \n\n\n14:00 — Liviu Ornea (University of Bucarest) \n\n Distinguished non-Kähler metrics on compact complex manifolds \n\nAbstract (Magen): \n   In this talk we will consider different flavours of homotopy theory for different types of geometric contexts. First we will recall the usual definitions of the homotopy category\, and equivariant homotopy categories\, and we will show how we can think of these in terms of (equivariant) smooth manifolds. This will give us a suitable framework with which to adapt the notion of homotopy theory to different geometries.\nWe first use this framework to give a brief overview of the story in algebraic geometry\, which produces motivic homotopy theory. Next\, we will use our framework to discuss notions of homotopy theories parametrized by a geometric object\, and discuss some consequences.\nDepending on time constraints and interest\, we will end either by discussing work relating this homotopical framework to 6-functor formalisms\, by going over a version of this story in the complex analytic setting\, or by introducing C∞-schemes and discussing possibilities for an extension of the story for manifolds to this setting. \nAbstract (Ornea):\n\n   I shall review the definitions of LCK\, pluriclosed and balanced metrics and discuss their incompatibility on the same compact complex manifold.
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-%d0%b8-%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/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251203T140000
DTEND;TZID=Europe/Sofia:20251203T153000
DTSTAMP:20260405T024342
CREATED:20251202T105237Z
LAST-MODIFIED:20251202T105237Z
UID:18619-1764770400-1764775800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Имаме удоволствието да обявим лекция на тема \nSL2 tropicalizations through valuation algebra\nот \nАндрей Бенгуш-Ласние (ИМИ-БАН)\, \nкоято ще бъде представена на Семинара по геометрия на МЦМН в сряда\, 3 декември 2025 г.\, от 14:00 часа  \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук:\nhttps://icms.bg/sl2-tropicalizations-through-valuation-algebra-geometry-seminar-talk-by-andrei-bengus-lasnier/ \nВръзка към Zoom:\nhttps://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1
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-20/
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:20251204
DTEND;VALUE=DATE:20251208
DTSTAMP:20260405T024342
CREATED:20250917T135115Z
LAST-MODIFIED:20251202T112416Z
UID:18210-1764806400-1765151999@math.bas.bg
SUMMARY:Национален семинар по теория на кодирането "Проф. Стефан Додунеков"
DESCRIPTION:Националният семинар с международно участие по Теория на кодирането\n“Професор Стефан Додунеков” \nза 2025 г. ще се проведе от 4 до 7 декември в Гардън Хотел Света Екатерина\, с. Рибарица. \nНаучната програма ще се проведе на 5 и 6 декември и включва доклади (до 20 минути)\, представяния на дисертации (до 40 минути) и дискусии. \nЗа участие в научната програма моля изпратете заглавие и кратък абстракт (до една страница) на Петър Бойваленков\, peter@math.bas.bg и Цонка Байчева\, tsonka@math.bas.bg до 23.11.2025 г. \nСеминарът е и отчетна сесия на секция Математически основи на информатиката към ИМИ-БАН. \nТаксата за правоучастие е 150 лв. (с включен ДДС). \nПРОГРАМА
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%82%d0%b5%d0%be%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%ba%d0%be%d0%b4%d0%b8%d1%80-5/
LOCATION:Гардън Хотел “Света Екатерина”\, с. Рибарица\, Bulgaria
CATEGORIES:Конференция,Работен семинар
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