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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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DTSTART;TZID=Europe/Sofia:20240911T140000
DTEND;TZID=Europe/Sofia:20240911T153000
DTSTAMP:20260405T135701
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:20251010T130000
DTEND;TZID=Europe/Sofia:20251010T143000
DTSTAMP:20260405T135701
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
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