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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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DTSTART:20240331T010000
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DTSTART:20241027T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250204T140000
DTEND;TZID=Europe/Sofia:20250204T153000
DTSTAMP:20260616T041644
CREATED:20250130T174422Z
LAST-MODIFIED:20250130T174422Z
UID:17270-1738677600-1738683000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 04.02.2025 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Мирослав Георгиев\, Институт по математика и информатика\, Българска академия на науките \nДоклад: Yukawa regulators in electrodynamics: Exact approach to the self-energy and anomalous g-factor \nДопълнителна информация: https://icms.bg/yukawa-regulators-in-electrodynamics-exact-approach-to-the-self-energy-and-anomalous-g-factor-icms-seminar-talk-by-miroslav-georgiev/ \nРезюме.  In the present talk\, we will discuss the prospect of electrodynamics in quantifying the self-interaction of a non-composite charged particle. We will demonstrate that under the consideration of unique to the particle Yukawa cut-offs the radial singularity in corresponding electromagnetic field potentials’ is removed allowing the classical theory to admit exact solutions for the particle’s self-energy and anomalous g-factor. Highly accurate results for the electron’s and muon’s anomalous g-factor will be presented\, with calculated values matching the most recent measurements reported in the literature to 0.59 ppt and 60 ppt\, respectively.
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-26/
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:20250130T140000
DTEND;TZID=Europe/Sofia:20250130T153000
DTSTAMP:20260616T041644
CREATED:20250128T163813Z
LAST-MODIFIED:20250128T163813Z
UID:17264-1738245600-1738251000@math.bas.bg
SUMMARY:Семинар "Математическо моделиране и числен анализ"
DESCRIPTION:Поредната сбирка на СЕМИНАРА на секция \n“Математическо моделиране и числен анализ”  \nще се състои на  30.01.2025 г. (четвъртък) от 14:00 часа по Zoom. \nДоклад на тема: \nSome mathematical aspects of simulation modeling of physiological processes in plants\nще изнесе Dr. Alex Topaj (Bureau Hyperborea Ltd). \nРезюме: The contribution presents the author’s experience of using mathematical methods to describe plant physiology processes in applied crop models. In contrast to the simplified data-based empirical approach\, the mechanistic description of plant vital processes in theory allows us to obtain new knowledge and to develop the universal crop models with parameters having physical meaning. Such explanatory models\, in addition to the traditional cause-and-effect method (the flow-balance approach\, leading to systems of differential or difference equations)\, can also successfully apply the alternative mathematical apparatus. The following examples of such use will be briefly presented: \n1) Organogenesis and phenological development of cereals. Dry matter distribution in the «shoot-root-ear» system as an optimal control problem of dynamic resource allocation.\n2) Stomatal Regulation. The functional balance between photosynthesis and transpiration under water stress.\n3) Biological nitrogen fixation of legumes. The interaction of active intellectual agents (plant and rhizobia) as an evolutionary game.\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%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-%d0%b8-%d1%87-7/
LOCATION:Zoom
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250114T140000
DTEND;TZID=Europe/Sofia:20250114T153000
DTSTAMP:20260616T041644
CREATED:20250113T165353Z
LAST-MODIFIED:20250113T165353Z
UID:17234-1736863200-1736868600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 14.01.2025 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Jean-Pierre Gazeau от Université Paris-Cité \nДоклад: Regularized Quantum Motion in a Bounded Set: Hilbertian Aspects \nДопълнителна информация: https://icms.bg/regularized-quantum-motion-in-a-bounded-set-hilbertian-aspects-talk-by-jean-pierre-gazeau/ \nРезюме. It is well known that the momentum operator canonically conjugated to the position operator for a particle confined within a bounded interval of the line (with Dirichlet boundary conditions) is not essentially self-adjoint\, as it possesses a continuum of self-adjoint extensions. In this talk\, we demonstrate that essential self-adjointness can be restored by symmetrically weighting the momentum operator with a positive bounded function that approximates the indicator function of the given interval. This weighted momentum operator arises naturally from a similarly weighted classical momentum through the Weyl-Heisenberg covariant integral quantization of functions or distributions. \nReference:\nF. Bagarello\, J.-P. Gazeau\, C. Trapani\, J. Math. Anal. Appl. 540 (2024) 128631
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-25/
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:20250108T170000
DTEND;TZID=Europe/Sofia:20250108T183000
DTSTAMP:20260616T041644
CREATED:20250106T202156Z
LAST-MODIFIED:20250106T202156Z
UID:17185-1736355600-1736361000@math.bas.bg
SUMMARY:Семинар на секция "Математически основи на информатиката"
DESCRIPTION:Семинарът по \nМАТЕМАТИЧЕСКИ ОСНОВИ НА ИНФОРМАТИКАТА \nорганизиран от \nСекция „Математически основи на информатиката“ към ИМИ – БАН и \nФакултет „Математика и информатика“ – ВТУ\, \nВи кани на поредната сбирка на 8 януари 2025 г. от 17:00 часа в зала 401 на корпус 4 на ВТУ\, на която \nProf. Ferruh Özbudak\nSabancı University\nFaculty of Engineering and Natural Sciences\,\nİstanbul – Turkiye\nще изнесе доклад на тема: \nGeneralizing the Bierbrauer—Friedman bound to mixed-level orthogonal arrays\n(joint work with Denis Krotov and Vladimir Potapov) \nAbstract: We characterize mixed-level orthogonal arrays it terms of algebraic designs in a special multigraph. We prove a mixed-level analog of the Bierbrauer–Friedman (BF) bound for pure-level orthogonal arrays and show that arrays attaining it are radius-1 completely regular codes (equivalently\, intriguing sets\, equitable 2-partitions\, perfect 2-colorings) in the corresponding multigraph. For the case when the numbers of levels are powers of the same prime number\, we characterize\, in terms of multispreads\, additive mixed-level orthogonal arrays attaining the BF bound. For pure-level orthogonal arrays\, we consider versions of the BF bound obtained by replacing the Hamming graph by its polynomial generalization and show that in some cases this gives a new bound. \nAcknowledgment: The work of F.Ö. was supported by TÜBİTAK under Grant 223N065. \nЗа тези\, които няма да могат да дойдат\, предлагаме да се включат онлайн през\n\nMicrosoft Teams Имате ли нужда от помощ?\n\n\nПрисъединете се към събранието сега\n\n\nИД на събрание: 363 497 232 460\n\n\nПарола: bF93pw6a
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%d0%be-23/
LOCATION:Великотърновски университет\, ул. "Теодосий Търновски" № 2\, Велико Търново\, 5005\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241205T153000
DTEND;TZID=Europe/Sofia:20241205T170000
DTSTAMP:20260616T041644
CREATED:20241129T133435Z
LAST-MODIFIED:20241129T133435Z
UID:17001-1733412600-1733418000@math.bas.bg
SUMMARY:Встъпителна лекция на проф. Емилия Бажлекова
DESCRIPTION:На 5 декември 2024 г. (четвъртък) от 15:30 ч. в зала 478 на ИМИ-БАН\, в рамките на семинара на секция „Анализ\, геометрия и топология“\, проф. Емилия Бажлекова ще изнесе встъпителна академична лекция на тема: \nПриложения на дробното смятане в моделирането на процеси с памет\nРезюме: През последните години значителен научен интерес се проявява към така нареченото дробно смятане\, което позволява интегриране и диференциране от произволен ред\, не непременно целочислен. До голяма степен това се дължи на приложенията на дробното смятане в математическото моделиране на различни процеси с памет\,  като например аномална дифузия и разпространение на вълни във вискоеластични среди. Започвайки от класическото уравнение на Ward-Tordai\, в лекцията се дискутират редица дробни еволюционни уравнения\, които описват процеси с памет. Основният фокус е върху изследването на тези модели чрез прилагане на аналитични методи: теорията на операторите и функциите на дробното смятане (предимно функции от типа на Митаг-Лефлер и техни обобщения)\, трансформация на Лаплас\, теорията на функциите на Бернщайн и някои специални класове функции\, свързани с тях.
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%b5%d0%bc%d0%b8%d0%bb%d0%b8%d1%8f-%d0%b1%d0%b0%d0%b6/
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:20241204T160000
DTEND;TZID=Europe/Sofia:20241204T173000
DTSTAMP:20260616T041644
CREATED:20241204T154928Z
LAST-MODIFIED:20241204T155031Z
UID:17057-1733328000-1733333400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 4 ДЕКЕМВРИ 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nTropical compactifications of moduli spaces – Part 2\n\nще изнесе Лайънъл Ланг\, Международен център по математически науки (МЦМН – София). \n\n\n\nAbstract: In this talk I will describe various tropical compactifications of the moduli spaces of curves. I will discuss some motivations and applications coming from tropical geometry (joint with M. Melo\, J. Rau and F. Viviani). \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-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241127T160000
DTEND;TZID=Europe/Sofia:20241127T173000
DTSTAMP:20260616T041644
CREATED:20241122T093719Z
LAST-MODIFIED:20241122T093719Z
UID:16962-1732723200-1732728600@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 27 ноември 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nTropical compactifications of moduli spaces\n\nще изнесе Лайънъл Ланг\, Международен център по математически науки (МЦМН – София). \n\n\n\nAbstract: In this talk I will describe various tropical compactifications of the moduli spaces of curves. I will discuss some motivations and applications coming from tropical geometry (joint with M. Melo\, J. Rau and F. Viviani). \n\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-14/
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:20241125T143000
DTEND;TZID=Europe/Sofia:20241125T160000
DTSTAMP:20260616T041644
CREATED:20241124T142625Z
LAST-MODIFIED:20241124T142625Z
UID:16967-1732545000-1732550400@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 25.11.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nАнализ на резултатите от Есенния математически турнир\nще изнесe \nНевена Събева-Колева.
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%b5-41/
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:20241122T130000
DTEND;TZID=Europe/Sofia:20241122T143000
DTSTAMP:20260616T041644
CREATED:20241119T092125Z
LAST-MODIFIED:20241119T092125Z
UID:16941-1732280400-1732285800@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 22 ноември 2024 г. (петък) от 13:00 часа в зала 578 на ИМИ\nще се проведе присъствено заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nOn Köthe’s normality question for locally finite-dimensional central division algebras\nще изнесе \nИван Чипчаков\, ИМИ – БАН. \nАбстракт. This talk considers Köthe’s question of whether every associative locally finite-dimensional (abbr.\, LFD) central division algebra R over a field K is a normally locally finite (abbr.\, NLF) algebra over K\, that is\, whether every nonempty finite subset Y of R is contained in a finite-dimensional central K-subalgebra RY of R. It shows that the answer to the posed question is negative if K is a purely transcendental extension of infinite transcendence degree over an algebraically closed field k. On the other hand\, central division LFD-algebras over K turn out to be NLF in the following special cases: (i) K is a field of finite Diophantine dimension\, for example\, if K is a finitely-generated extension of a finite or a pseudo-algebraically closed field; (ii) K is a higher-dimensional local field with a finite last residue field. \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%b0-115/
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:20241121T080000
DTEND;TZID=Europe/Sofia:20241124T170000
DTSTAMP:20260616T041644
CREATED:20241021T082146Z
LAST-MODIFIED:20241021T082557Z
UID:16927-1732176000-1732467600@math.bas.bg
SUMMARY:Национален семинар по теория на кодирането "Проф. Стефан Додунеков"
DESCRIPTION:Националният семинар с международно участие по Теория на кодирането “Професор Стефан Додунеков” за 2024 г. ще се проведе от 21 до 24 ноември в парк-хотел „Севастократор”\, с. Арбанаси. \nНаучната програма ще се проведе на 22 и 23 ноември 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 чл.-кор. Петър Бойваленков\, peter@math.bas.bg и проф. Цонка Байчева\, tsonka@math.bas.bg най-късно до 11 ноември 2024 г. \nСеминарът е и отчетна сесия на секция Математически основи на информатиката към ИМИ-БАН.
URL:https://math.bas.bg/event/nacionalen-seminar-moi-2024/
LOCATION:Парк-хотел “Севастократор\, с. Арбанаси
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241029T140000
DTEND;TZID=Europe/Sofia:20241029T153000
DTSTAMP:20260616T041644
CREATED:20241023T203322Z
LAST-MODIFIED:20241023T203322Z
UID:16935-1730210400-1730215800@math.bas.bg
SUMMARY:Предзащита на дисертацията на Цветелин Заевски за присъждане на научната степен “доктор на науките”
DESCRIPTION:На 29 октомври 2024 г. (вторник) от 14:00 ч. в Зала 503 на ИМИ-БАН\, в рамките на семинара на секция ИОВС\, \nще се проведе предварителна защита на проекта на дисертационен труд на \nЦветелин Стефанов Заевски \nна тема \nUtility-based approach for pricing American-style derivatives\nза присъждане на  научната степен “доктор на науките”\nв област на висше образование 4. Природни науки\, математика и информатика\,\nпрофесионално направление 4.5 Математика\,\nнаучна специалност “Теория на вероятностите и математическа статистика”. \n\nПоканват се всички интересуващи се. \nПроектът на дисертацията е на разположение в библиотеката на ИМИ – БАН. \n\n\n 
URL:https://math.bas.bg/event/%d0%bf%d1%80%d0%b5%d0%b4%d0%b7%d0%b0%d1%89%d0%b8%d1%82%d0%b0-%d0%bd%d0%b0-%d0%b4%d0%b8%d1%81%d0%b5%d1%80%d1%82%d0%b0%d1%86%d0%b8%d1%8f%d1%82%d0%b0-%d0%bd%d0%b0-%d1%86%d0%b2%d0%b5%d1%82%d0%b5%d0%bb/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Защита,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:20241028T143000
DTEND;TZID=Europe/Sofia:20241028T160000
DTSTAMP:20260616T041644
CREATED:20241019T201028Z
LAST-MODIFIED:20241019T201028Z
UID:16916-1730125800-1730131200@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 28.10.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nСтарият (не)познат Logo: примери\, идеи\, пропускани възможности\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%b5-40/
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:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260616T041644
CREATED:20241015T211136Z
LAST-MODIFIED:20241015T211136Z
UID:16891-1729605600-1729611000@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 22 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing – част 2\nще изнесе Александр Варипаев от секция ИОСВ. \n\nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
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%b5-7/
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:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260616T041644
CREATED:20241009T121248Z
LAST-MODIFIED:20241009T121248Z
UID:16877-1729605600-1729611000@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 22 октомври 2024 г. от 14:00 часа в зала 478 на ИМИ – БАН.\nДоклад на тема: \nHigher order estimates for Monge-Ampere type equations motivated by quaternionic geometry\nще изнесе Marcin Sroka\, Jagiellonian University\, Kraków\, Poland. \nПоканват се всички интересуващи се. \nРезюме. In the talk I will discuss obstacles for obtaining higher order a priori estimates for equation introduced by Alesker and Verbitsky in 2010 on HKT manifolds in relation to Calabi type conjecture on those manifolds (and similar type PDEs studied since on hypercomplex manifolds). After presenting the state of art\, I will focus on the key second order estimate. For the real Monge-Ampere equation on Riemannian manifolds it follows essentially by Pogorelov calculation\, for the complex Monge-Ampere equation\, in relation to Calabi conjecture\, it was proven by Aubin and Yau. I will use those two as comparison to underline new difficulties related to concavity properties of quaternionic Monge-Ampere operator. \nПосещението на лектора е финансирано по Научна програма ” Повишаване на изследователския капацитет в областта на математическите науки (ПИКОМ)”\, № ДО1-67/05.05.2022. \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%b8-23/
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:20241015T140000
DTEND;TZID=Europe/Sofia:20241015T153000
DTSTAMP:20260616T041644
CREATED:20241009T142051Z
LAST-MODIFIED:20241009T142051Z
UID:16881-1729000800-1729006200@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 15 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing\nще изнесе Александр Варипаев от секция ИОСВ. \nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
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%b5-6/
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:20241015T140000
DTEND;TZID=Europe/Sofia:20241015T153000
DTSTAMP:20260616T041644
CREATED:20241003T141157Z
LAST-MODIFIED:20241003T141242Z
UID:16844-1729000800-1729006200@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 15 октомври 2024 г. от 14:00 часа в зала 478 на ИМИ – БАН.\nДоклад на тема: \nUnimodality Preservation by Ratios of Functional Series and Integral Transforms\nще изнесе Dmitrii Karp\, Holon Institute of Technology\, Holon\, Israel. \nПоканват се всички интересуващи се. \nРезюме. Elementary\, but very useful lemma due to Biernacki and Krzyz (1955) asserts that the ratio of two power series inherits monotonicity from that of the sequence of ratios of their corresponding coefficients. Over the last two decades it has been realized that\, under some additional assumptions\, similar claims hold for more general series ratios and integral transforms as well as for unimodality in place of monotonicity. In the talk\, we discuss conditions on the functional sequence and the kernel of an integral transform ensuring such property. Numerous series and integral transforms appearing in applications satisfy our sufficient conditions\, including Dirichlet\, factorial and inverse factorial series\, Laplace\, Mellin and generalized Stieltjes transforms\, among many others. The key role in our considerations is played by the notion of sign regularity. \n\n 
URL:https://math.bas.bg/event/copy-%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/
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:20241014T143000
DTEND;TZID=Europe/Sofia:20241014T160000
DTSTAMP:20260616T041644
CREATED:20241002T080508Z
LAST-MODIFIED:20241002T080508Z
UID:16818-1728916200-1728921600@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 14.10.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nСъстезателни задачи с покриващи оцветявания в СтруниМа\nще изнесe \nд-р Младен Вълков.
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%b5-39/
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:20241009T140000
DTEND;TZID=Europe/Sofia:20241009T153000
DTSTAMP:20260616T041644
CREATED:20241002T105535Z
LAST-MODIFIED:20241003T174002Z
UID:16822-1728482400-1728487800@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 9 октомври (сряда) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\, част 2\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
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%b5-5/
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:20241002T140000
DTEND;TZID=Europe/Sofia:20241002T153000
DTSTAMP:20260616T041644
CREATED:20240926T130536Z
LAST-MODIFIED:20240926T130536Z
UID:16798-1727877600-1727883000@math.bas.bg
SUMMARY:Семинар на секция "Математически основи на информатиката"
DESCRIPTION:На 2 октомври 2024 г. (сряда) от 14:00 часа в зала 478 на ИМИ-БАН\nще се състои поредната сбирка на семинара на секция\n„Математически основи на информатиката”. \nДоклад на тема \nLipschitz Permutations on Certain Graphs\nще изнесе Драгомир Грозев. \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%d0%be-22/
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:20241001T140000
DTEND;TZID=Europe/Sofia:20241001T153000
DTSTAMP:20260616T041644
CREATED:20240926T125611Z
LAST-MODIFIED:20240926T125611Z
UID:16794-1727791200-1727796600@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 1 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
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%b5-4/
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%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:20240930T143000
DTEND;TZID=Europe/Sofia:20240930T160000
DTSTAMP:20260616T041644
CREATED:20240921T161650Z
LAST-MODIFIED:20240921T161650Z
UID:16772-1727706600-1727712000@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 30.09.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nПодготовка на България за Младежката Балканска олимпиада по математика – материали и препоръки за ученици\, учители и ръководители\nще изнесe \nас. Мирослав Маринов.
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%b5-37/
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:20240918T140000
DTEND;TZID=Europe/Sofia:20240918T153000
DTSTAMP:20260616T041644
CREATED:20240910T173803Z
LAST-MODIFIED:20240911T101734Z
UID:16734-1726668000-1726673400@math.bas.bg
SUMMARY:Семинар "Математическо моделиране и числен анализ"
DESCRIPTION:Поредната сбирка на СЕМИНАРА на секция \n“Математическо моделиране и числен анализ”  \nще се състои на  18.09.2024 (сряда)\, от 14:00 часа в зала 478 на Института по математика и информатика. \nДоклад на тема: \nSingular perturbation theory in epidemic modelling\nще изнесе Sara Sottile (University of Bologna\, Italy). \nРезюме: In real world scenarios\, the natural phenomena usually evolve on time scales differing by various orders of magnitude. Such separation in time-scales can be found\, for example\, in the field of chemical oscillations [1]\, neuroscience [2]\, ecology [3] or opinion/information spreading [4]. In this context\, Geometric Singular Perturbation Theory (GSPT) is a powerful analytical technique which fully exploits the underlying time-scale separation. Epidemiological models also provide a natural fit for these dynamics. Consider\, for instance\, models that incorporate information dynamics [5\, 6]\, host-vector interactions [7\, 8]\, or even those that account for immunity loss and reinfection processes\, which occur over extended time scales [9]. This seminar will introduce the fundamental concepts of Geometric Singular Perturbation Theory (GSPT) and explore its applications in epidemiology\, using various tools and techniques to illustrate the range of its potential. \nReferences \n[1] Jelbart\, S.\, Pages\, N.\, Kirk\, V.\, Sneyd\, J.\, Wechselberger\, M. (2022). Process-oriented geometric singular perturbation theory and calcium dynamics. SIAM Journal on Applied Dynamical Systems\, 21(2): 982–1029. \n[2] Desroches\, M.\, Krauskopf\, B.\, Osinga\, H. M. (2008). Mixed-mode oscillations and slow manifolds in the self-coupled FitzHugh-Nagumo system. Chaos: An Interdisci- plinary Journal of Nonlinear Science\, 18(1): 015107. \n[3] Rinaldi\, S.\, Scheffer\, M. (2000). Geometric analysis of ecological models with slow and fast processes. Ecosystems\, 3: 507-521. \n[4] S. Schecter. (2021) Geometric singular perturbation theory analysis of an epidemic model with spontaneous human behavioral change. Journal of Mathematical Biology\, 82(6):1–26. \n[5] Della Marca\, R.\, d’Onofrio\, A.\, Sensi\, M.\, Sottile\, S. (2024). A geometric analysis of the impact of large but finite switching rates on vaccination evolutionary games. Nonlinear Analysis: Real World Applications\, 75: 103986. \n[6] Bulai\, I.M.\, Sensi\, M.\, Sottile\, S. (2024). A geometric analysis of the SIRS compartmental model with fast information and misinformation spreading. Chaos\, Solitons & Fractals\, 185\, 115104. \n[7] Aguiar\, M.\, Kooi\, B. W.\, Pugliese\, A.\, Sensi\, M.\, Stollenwerk\, N. (2021) Time scale separation in the vector borne disease model SIRUV via center manifold analysis. medRxiv \n[8] Rashkov\, P.\, Kooi\, B. W. (2021) Complexity of host-vector dynamics in a two-strain dengue model. Journal of Biological Dynamics\, 15(1)\, 35–72. \n[9] Kaklamanos\, P.\, Pugliese\, A.\, Sensi\, M.\, Sottile\, S. (2024). A geometric analysis of the SIRS model with secondary infections. SIAM Journal on Applied Mathematics\, 84(2). \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%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-%d0%b8-%d1%87-6/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240911T140000
DTEND;TZID=Europe/Sofia:20240911T153000
DTSTAMP:20260616T041644
CREATED:20240911T102717Z
LAST-MODIFIED:20240911T102717Z
UID:16739-1726063200-1726068600@math.bas.bg
SUMMARY:Семинар "Диференциални уравнения и математическа физика"
DESCRIPTION:На 11.09.2024 г. от 14:00 ч. в зала 478 на ИМИ\nи онлайн в Zoom ще се състои поредната сбирка на\nсеминара по Диференциални уравнения и математическа физика.\nДоклад на тема \nWigner’s elementary systems in de Sitter spacetime\nще изнесе Хамед Педжан. \nАбстракт. Quantum elementary systems are associated with (projective) unitary irreducible representations (UIRs) of the relativity group (or one of its covering groups). This foundational perspective was first introduced by Wigner in his seminal 1939 paper\, within the framework of Einstein-Poincaré relativity. In this talk\, building on Wigner’s approach\, we will briefly introduce the de Sitter relativity group\, its representations\, and outline the basics of constructing elementary systems within the global structure of de Sitter spacetime. \nЛинка към Зуум стаята: \nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/84236008764?pwd=hWm1knPWJteBkh4iMX0mUCVmPIvWMh.1 \nMeeting ID: 842 3600 8764\nPasscode: 349193
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%b0-5/
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:20240911T140000
DTEND;TZID=Europe/Sofia:20240911T153000
DTSTAMP:20260616T041644
CREATED:20240829T154321Z
LAST-MODIFIED:20240829T154607Z
UID:16707-1726063200-1726068600@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:Subdiffusion-reaction systems: from microscopic random walk to the mesoscopic fractional PDE’s\nДокладчик: проф. Сергей Федотов\, ръководител на групата по приложна математика в университета на Манчестър\nДата: 11.09.2024 г.\nЧас: 14:00 ч.\nМясто: зала 403 \nРезюме: An interesting feature of subdiffusion-reaction systems is the lack of a universal model for reactions in subdiffusive media. Consequently\, the coarse-grained fractional subdiffusion-reaction equations depend on the specific details of the underlying microscopic random walk models. This complexity arises from the memory effects inherent in subdiffusive transport systems. Simply adding a reaction term to the transport equation can be physically inconsistent. Due to the memory effect\, the subdiffusion process depends on the entire history of the system’s evolution making the diffusion and reaction processes inseparable. \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%b0-11/
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240910T140000
DTEND;TZID=Europe/Sofia:20240910T153000
DTSTAMP:20260616T041644
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:20260616T041644
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:20260616T041644
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:20260616T041644
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:20260616T041644
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:20260616T041644
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/
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