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X-WR-CALNAME:Institute of Mathematics and Informatics
X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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TZID:Europe/Sofia
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TZOFFSETFROM:+0200
TZOFFSETTO:+0300
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DTSTART:20240331T010000
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TZOFFSETFROM:+0300
TZOFFSETTO:+0200
TZNAME:EET
DTSTART:20241027T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240903T140000
DTEND;TZID=Europe/Sofia:20240903T153000
DTSTAMP:20260627T161132
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:20240910T140000
DTEND;TZID=Europe/Sofia:20240910T153000
DTSTAMP:20260627T161132
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:20240911T140000
DTEND;TZID=Europe/Sofia:20240911T153000
DTSTAMP:20260627T161132
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:20240911T140000
DTEND;TZID=Europe/Sofia:20240911T153000
DTSTAMP:20260627T161132
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:20240918T140000
DTEND;TZID=Europe/Sofia:20240918T153000
DTSTAMP:20260627T161132
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:20240930T143000
DTEND;TZID=Europe/Sofia:20240930T160000
DTSTAMP:20260627T161132
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
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