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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20260424T130000
DTEND;TZID=Europe/Sofia:20260424T143000
DTSTAMP:20260428T125816
CREATED:20260417T152450Z
LAST-MODIFIED:20260417T152558Z
UID:19128-1777035600-1777041000@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 24 април 2026 г. (петък) от 13:00 часа\nв зала 578 на ИМИ-БАН и онлайн чрез платформата zoom\nще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nSets preserved by a large subgroup of the special linear group\nще изнесе \nКалоян Славов (Медицински университет\, София).\nРезюме. The classical Kakeya problem in Euclidean space asks how “small” a set can be if it contains a unit line segment in every direction. More generally\, packing sets contain all images of a given set under a collection of transformations. Finite field analogues offer a combinatorial and algebraic perspective and motivate our work. \nWe study sets \(E\) in the affine plane over a finite field that are invariant under a large subgroup \(R\) of \(SL_2\). We prove that if \(|R|>c|E|^{3/2}\)\, then \(E\) must be contained in a line. The exponent \(3/2\) is sharp. We conclude with a remark on a related phenomenon in the Euclidean setting. This is joint work with Thang Pham and Le Quang-Hung. \n\nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/88300991142?pwd=wGYl7VaD9RZKEm99sKzHMzl3bYCv3J.1\n\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%b0-126/
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:20260421T140000
DTEND;TZID=Europe/Sofia:20260421T153000
DTSTAMP:20260428T125816
CREATED:20260313T181017Z
LAST-MODIFIED:20260414T192701Z
UID:18986-1776780000-1776785400@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 21 април 2026 г. (вторник) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nHow long does it take to train an Elephant Random Walk\nще изнесе \nZheng Fang (University of Zurich). \n\nРезюме: We study how conditioning on the first \(k\) steps\, which we think of as training\, affects the long-term behavior of the Elephant Random Walk. When the elephant is conditioned to be at position \(k\) at time \(k\)\, the first return time to the origin scales as \(k^{(4−4p)⁄(3−4p)}\) in the diffusive regime\, and grows exponentially in the critical regime. We loosely interpret this as a measurement of the rate at which the elephant forgets its training. \nПовече информация за доклада можете да намерите на страницата на семинара: \n\nhttp://www.math.bas.bg/~statlab/NSPS/\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%b0-45/
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:20260415T140000
DTEND;TZID=Europe/Sofia:20260415T153000
DTSTAMP:20260428T125816
CREATED:20260414T191905Z
LAST-MODIFIED:20260414T191905Z
UID:19098-1776261600-1776267000@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Лекция на тема \nPhase Tropical hypersurfaces and their cousins\nот \nIlia Zharkov (KSU) \nще бъде представена на Семинара по геометрия на МЦМН в сряда\, 15 април 2026 г.\, от 14:00 часа  \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук: \n\nPhase Tropical hypersurfaces and their cousins\, Geometry seminar talk by Ilia Zharkov \n\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-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:20260406T141500
DTEND;TZID=Europe/Sofia:20260406T153000
DTSTAMP:20260428T125816
CREATED:20260404T110836Z
LAST-MODIFIED:20260404T110836Z
UID:19093-1775484900-1775489400@math.bas.bg
SUMMARY:Семинар по оптимизация
DESCRIPTION:На 6 април 2026 г. (понеделник) от 14:15 ч. в зала 478 на ИМИ-БАН ще се проведе съвместна сбирка на \nСеминара по оптимизация (ФМИ) и на Семинара по изследване на операциите (ИМИ). \nДоклад на тема \nHausdorff characterizations of first countable T1 spaces via fixed point theorems\nще изнесе Детелина Камбурова. \nПоканват се всички желаещи да присъстват.
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%d0%bf%d1%82%d0%b8%d0%bc%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f/
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:20260403T130000
DTEND;TZID=Europe/Sofia:20260403T143000
DTSTAMP:20260428T125816
CREATED:20260330T115722Z
LAST-MODIFIED:20260330T115722Z
UID:19024-1775221200-1775226600@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 3 април 2026 г. (петък) от 13:00 часа\nще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nOn Pairs of Non-commuting Hermitian Operators on the Unitary Plane which are Permutable Measurements\nще изнесе \nВалентин Илиев (ИМИ-БАН).\nРезюме. In this presentation we study observables with spectre {-1\,1} on quantum systems with the unitary plane as a space of states. Examples of such quantum systems are spin-1/2 particles. We find necessary and sufficient conditions for two non-commuting observables to be permutable measurements\, that is\, the probability of obtaining a particular pair of results does not depend on the order of taking these measurements. Several examples are presented. \n\nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/88300991142?pwd=wGYl7VaD9RZKEm99sKzHMzl3bYCv3J.1\n\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%b0-125/
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:20260325T140000
DTEND;TZID=Europe/Sofia:20260325T153000
DTSTAMP:20260428T125816
CREATED:20260320T114625Z
LAST-MODIFIED:20260320T114625Z
UID:19002-1774447200-1774452600@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Втора лекция на тема \nAlgebraic Curves and Brill–Noether Theory\nот \nTurgay Akyar (IMI-BAS) \nще бъде представена на Семинара по геометрия на МЦМН в сряда\, 25 март 2026 г.\, от 14:00 часа  \nв зала 578 и чрез Zoom. \nПовече подробности можете да намерите тук: \n\nAlgebraic Curves and Brill–Noether Theory\, Geometry seminar talk by Turgay Akyar \n\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-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:20260323T143000
DTEND;TZID=Europe/Sofia:20260323T153000
DTSTAMP:20260428T125816
CREATED:20260319T161702Z
LAST-MODIFIED:20260319T161702Z
UID:18997-1774276200-1774279800@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 23.03.2026 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nАнализ на резултатите от Областния кръг на НОМ за 4. – 7. клас през 2026 г.\nще изнесат \nНевена Събева и Боянка Савова. \nЛинк за Zoom:\nhttps://us06web.zoom.us/j/85301210701?pwd=EbSkFBRiNmawJ9AEE8u6saNroAGr1G.1\nMeeting ID: 853 0121 0701\nPasscode: 274471
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%b5-43/
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:20260318T140000
DTEND;TZID=Europe/Sofia:20260318T153000
DTSTAMP:20260428T125816
CREATED:20260313T180211Z
LAST-MODIFIED:20260313T180211Z
UID:18981-1773842400-1773847800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Лекция на тема \nDistribution and Correlation of Polynomial Farey Fractions\nот \nSneha Chaubey (Indraprastha Institute of Information Technology) \nще бъде представена на Семинара по геометрия на МЦМН в сряда\, 18 март 2026 г.\, от 14:00 часа  \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук: \n\nDistribution and Correlation of Polynomial Farey Fractions\, Geometry seminar talk by Sneha Chaubey \n\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-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:20260317T130000
DTEND;TZID=Europe/Sofia:20260317T143000
DTSTAMP:20260428T125816
CREATED:20260308T223545Z
LAST-MODIFIED:20260308T223648Z
UID:18966-1773752400-1773757800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Two lectures by Milen Yakimov\,\nchair of the group on Cluster Algebras and Quantum Groups at the ICMS\, IMI-BAS.\n\nTuesday\, March 10\, at 13:00 in room 403\, IMI-BAS.\nCluster structures on quantum groups and the full Berenstein-Zelevinsky conjecture\n\nTuesday\, March 17\, at 13:00 in room 403\, IMI-BAS.\nReflective centres of module categories and quantum K-matrices\n\nAbstracts:\nMarch 10: Cluster Algebras were invented by Fomin and Zelevinsky in the early 2000s and quickly turned into an indispensable tool in many areas of mathematics. In this talk\, we will provide a gentle introduction to the subject. From the early days of the theory of cluster algebras\, one of the desired constructions was to turn the quantized coordinate rings of complex simple Lie groups into quantum cluster algebras. This remained elusive. We will present a resolution of this conjecture and of the Berenstein-Zelevinsky conjecture on cluster structures on quantum double Bruhat cells. This is a joint work with Fan Qin and Hironori Oya.\n\nMarch 17: Braided monoidal categories have applications in various situations. In particular\, their universal R-matrices give solutions of the quantum Yang-Baxter equation and representations of braid groups of type A. There are powerful methods for constructing them: Drinfeld doubles of Hopf algebras and Drinfeld centres of monoidal categories. On the other hand\, universal K-matrices\, leading to solutions of the reflection equation and representations of braid groups of type B are much less well understood and there are no general constructions for them. We will describe a construction of reflective centers of module categories. It gives rise to a quantum double construction for universal K-matrices\, which can be viewed as a type B analog of Drinfeld’s double construction. This is a joint work with Robert Laugwitz and Chelsea Walton.\n\nMore information can be found on the seminar’s web-page:\nhttps://icms.bg/category/icms-seminar/
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-43/
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:20260311T140000
DTEND;TZID=Europe/Sofia:20260311T153000
DTSTAMP:20260428T125816
CREATED:20260308T222721Z
LAST-MODIFIED:20260308T222721Z
UID:18956-1773237600-1773243000@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Лекция на тема \nAlgebraic Curves and Brill–Noether Theory\nот \nTurgay Akyar (ИМИ-БАН)\, \nще бъде представена на Семинара по геометрия на МЦМН в сряда\, 11 март 2026 г.\, от 14:00 часа  \nв зала 278 и чрез Zoom. \nПовече подробности можете да намерите тук: \n\nAlgebraic Curves and Brill–Noether Theory\, Geometry seminar talk by Turgay Akyar \n\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-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:20260310T130000
DTEND;TZID=Europe/Sofia:20260310T143000
DTSTAMP:20260428T125816
CREATED:20260308T223413Z
LAST-MODIFIED:20260308T223413Z
UID:18961-1773147600-1773153000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Two lectures by Milen Yakimov\,\nchair of the group on Cluster Algebras and Quantum Groups at the ICMS\, IMI-BAS.\n\nTuesday\, March 10\, at 13:00 in room 403\, IMI-BAS.\nCluster structures on quantum groups and the full Berenstein-Zelevinsky conjecture\n\nTuesday\, March 17\, at 13:00 in room 403\, IMI-BAS.\nReflective centres of module categories and quantum K-matrices\n\nAbstracts:\nMarch 10: Cluster Algebras were invented by Fomin and Zelevinsky in the early 2000s and quickly turned into an indispensable tool in many areas of mathematics. In this talk\, we will provide a gentle introduction to the subject. From the early days of the theory of cluster algebras\, one of the desired constructions was to turn the quantized coordinate rings of complex simple Lie groups into quantum cluster algebras. This remained elusive. We will present a resolution of this conjecture and of the Berenstein-Zelevinsky conjecture on cluster structures on quantum double Bruhat cells. This is a joint work with Fan Qin and Hironori Oya.\n\nMarch 17: Braided monoidal categories have applications in various situations. In particular\, their universal R-matrices give solutions of the quantum Yang-Baxter equation and representations of braid groups of type A. There are powerful methods for constructing them: Drinfeld doubles of Hopf algebras and Drinfeld centres of monoidal categories. On the other hand\, universal K-matrices\, leading to solutions of the reflection equation and representations of braid groups of type B are much less well understood and there are no general constructions for them. We will describe a construction of reflective centers of module categories. It gives rise to a quantum double construction for universal K-matrices\, which can be viewed as a type B analog of Drinfeld’s double construction. This is a joint work with Robert Laugwitz and Chelsea Walton.\n\nMore information can be found on the seminar’s web-page:\nhttps://icms.bg/category/icms-seminar/
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-42/
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:20260225T140000
DTEND;TZID=Europe/Sofia:20260225T153000
DTSTAMP:20260428T125816
CREATED:20260130T143214Z
LAST-MODIFIED:20260218T093843Z
UID:18831-1772028000-1772033400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Отложената лекция на тема \nTropical curves with applications\nот \nПетър Петров (ИМИ-БАН)\, \nще бъде представена на Семинара по геометрия на МЦМН в сряда\, 25 февруари 2026 г.\, от 14:00 часа  \nв зала 403 и чрез Zoom. \nПовече подробности можете да намерите тук: \n\nTropical curves with applications\, Geometry seminar talk by Petar Petrov \n\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-21/
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:20260127T130000
DTEND;TZID=Europe/Sofia:20260127T143000
DTSTAMP:20260428T125816
CREATED:20260127T141628Z
LAST-MODIFIED:20260127T141628Z
UID:18826-1769518800-1769524200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата и място: Вторник\, 27.01.2026 г.\, 13:00 ч.\, Зала 403\, ИМИ – БАН \nДокладчик: Jean-Pierre Gazeau (Université Paris Cité\, CNRS\, and University of Białystok) \nЗаглавие: Spectral and angular variables for open qudit dynamics \nAbstract:  In this talk\, I introduce a parametrization of finite-dimensional quantum states that is particularly adapted to the study of open qudit dynamics. Any generic density matrix in Cn can be described by separating spectral variables\, which encode the eigenvalue content\, from angular variables associated with the unitary degrees of freedom. These angular variables naturally live on the coset space SU(n)/T\, in the spirit of the Tilma–Sudarshan construction.\nA key outcome of this parametrization is a partial decoupling of the GKLS evolution: while the angular variables are driven by both the Hamiltonian and the dissipative contributions\, the spectral variables evolve under the dissipative part only. This separation provides a transparent geometric picture of decoherence and dissipation. Simple examples for qubits and qutrits are discussed\, together with an alternative\, geometrically motivated notion of purity expressed solely in terms of the spectral variables in a linear way. \nДопълнителна информация можете да намерите на сайта на семинара:\nhttps://icms.bg/category/icms-seminar/
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-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:20260120T130000
DTEND;TZID=Europe/Sofia:20260120T143000
DTSTAMP:20260428T125816
CREATED:20260115T144514Z
LAST-MODIFIED:20260115T144532Z
UID:18781-1768914000-1768919400@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата и място: Вторник\, 20.01.2026 г.\, 13:00 ч.\, Зала 403\, ИМИ – БАН \nДокладчик: Bogdan Đorđević (Serbian Academy of Arts and Sciences) \nЗаглавие: Applications of Banach algebras and Banach modules to some contemporary analysis problems \nAbstract:\nIn recent years applied mathematics has experienced a historical progress\, blurring the lines between the previously clear research paths and directions. Accordingly\, contemporary mathematical analysis is at the verge of unifying seemingly different research areas and topics. With this in mind\, I’d like to talk about my humble contribution to this cause: my lecture will concern how Banach algebras and modules\, combined with spectral theory\, functional calculus\, and generalized inverses\, help in various problems that emerge in applied mathematics in general: from solving operator and matrix equations\, to evaluating sums of some Banach-space-valued series\, to analyzing some unstable abstract Cauchy problems\, and finally to approximating solutions to functional stochastic differential equations. \nДопълнителна информация можете да намерите на сайта на семинара:\nhttps://icms.bg/category/icms-seminar/
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-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:20260112T140000
DTEND;TZID=Europe/Sofia:20260112T163000
DTSTAMP:20260428T125816
CREATED:20260111T123322Z
LAST-MODIFIED:20260111T123546Z
UID:18740-1768226400-1768235400@math.bas.bg
SUMMARY:Семинар по особености
DESCRIPTION:Кога и къде: 12.01.2026 г.\, понеделник\, от 14:00 ч. в зала 578 на ИМИ – БАН\nДокладчик:  Валдемар Цанов (ИМИ – БАН)\nЗаглавие на доклада: Geometry of Milnor fibrations of equivariant plane curves\nРезюме: The local knot of an irreducible C*-equivariant complex plane curve singularity is a torus knot\, and the Milnor fiber is a Seifert surface for this knot. I will describe an explicit universal cover of the Milnor fiber by the hyperbolic plane\, using automorphic forms for triangle groups. The characteristic morphism of the Milnor fibration can also be recovered\, and used to construct geometric structures by universal covers on the knot complement in the 3-sphere\, as well as on the complement of the singular curve in the complex plane.
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%b8-3/
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:20251210T150000
DTEND;TZID=Europe/Sofia:20251210T163000
DTSTAMP:20260428T125816
CREATED:20251205T143322Z
LAST-MODIFIED:20251205T143322Z
UID:18661-1765378800-1765384200@math.bas.bg
SUMMARY:Семинар по приложна математика
DESCRIPTION:Следващата сбирка на Семинара по приложна математика ще се проведе на 10 декември (сряда) от 15:00 в зала 503 на ИМИ-БАН. \nДокладчик: Giuseppe D’Onofrio (Politecnico di Torino\, Италия) \nЗаглавие: ADDITIVE SUBORDINATION OF MULTIPARAMETER MARKOV PROCESSES \nРезюме: In this talk\, we consider multiparameter multidimensional Markov processes that are time-changed by an independent additive subordinator\, obtained from a Lévy process by relaxing the condition of stationary increments. By extending Phillips theorem\, we show that the resulting process is a Feller evolution and we characterize its generator. We further derive its pseudo-differential representation and show that its symbol admits a Lévy-Khintchine representation. As an application\, we consider a factor-based specification for the Ornstein-Uhlenbeck process subordinated by a Sato process. The constructive nature of this process is inspired by applications in finance which will be briefly discussed.
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%b0-17/
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:20251209T141500
DTEND;TZID=Europe/Sofia:20251209T153000
DTSTAMP:20260428T125816
CREATED:20251204T102243Z
LAST-MODIFIED:20251204T103120Z
UID:18646-1765289700-1765294200@math.bas.bg
SUMMARY:Семинар на секция ИОВС
DESCRIPTION:На 9 декември 2025 г. (вторник) от 14:15 часа в зала 503 на ИМИ-БАН и онлайн чрез платформата zoom ще се проведе хибридно заседание на семинара на секция „Изследване на операциите\, вероятности и статистика“. Доклад на тема: \nДиференцируеми функции със сюрективни обобщени Якобиани\nще изнесе д-р Себастиан Тапия Гарсия от изследователската група по Вариационен анализ\, динамика и изследване на операциите на Техническия Университет Виена. \nАбстракт. In this talk we start with a brief discussion about the possible values that the limiting and Clarke Jacobians can take in the class of differentiable locally Lipschitz functions (defined on finite dimensional spaces). Then\, we construct a differentiable locally Lipschitz function \(f:R^n\to R^m\) such that\, for any nonempty compact connected \(C \subset R^{n х m}\)\, we can find a point \(x\) in \(R^n\) such that \(C\) coincides with the limiting Jacobian of \(f\) at \(x\). In particular\, the Clarke Jacobian of \(f\) ranges all its possible values. \n\nThis work has been done in collaboration with Aris Daniilidis and Robert Deville. \n\nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/82516739771?pwd=bwANwCbtbc7nRDAOjo0HuoyarUauAS.1\n\nПоканват се всички\, които се интересуват от темата.
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%b8%d0%be%d0%b2%d1%81/
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:20251205T130000
DTEND;TZID=Europe/Sofia:20251205T143000
DTSTAMP:20260428T125816
CREATED:20251202T111458Z
LAST-MODIFIED:20251202T111458Z
UID:18631-1764939600-1764945000@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 5 декември 2025 г. (петък) от 13:00 часа в зала 578 на ИМИ-БАН и онлайн чрез платформата zoom\nще се проведе хибридно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nКласически резултати в интервална темпорална логика с разширяващи модалности и кратките им доказателства с теоремата за разделянето\nще изнесе \nДимитър Гелев (ИМИ-БАН).\nРезюме. Показваме как\, с помощта на автомати на Стрийт и нашата теорема за разделянето в интервалната темпорална логика с разширяващи модалности ITL-NL\, се получават кратки доказателства на изразимостта в ITL-NL на квантора по съждителните променливи и интервални версии на нормалните форми от йерархията на Манна и Пнюели и\, като следствие\, интерполационната теорема на Крейг и теоремата за явната определимост на Бет. Формите от йерархията на Манна и Пнюели и теоремите на Крейг и Бет са технически нови за интервалната темпорална логика\, и казаните кратки доказателства са и първите им доказателства\, но всичките резултати са с утвърдено предварително известно приложение\, и в по-прости темпорални логики и вън от темпоралната логика. \n\nЛинк към zoom-стаята на семинара:\nHttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09\n\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%b0-124/
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:20251203T140000
DTEND;TZID=Europe/Sofia:20251203T153000
DTSTAMP:20260428T125816
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;TZID=Europe/Sofia:20251202T130000
DTEND;TZID=Europe/Sofia:20251202T160000
DTSTAMP:20260428T125816
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251126T160000
DTEND;TZID=Europe/Sofia:20251126T173000
DTSTAMP:20260428T125816
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251125T130000
DTEND;TZID=Europe/Sofia:20251125T143000
DTSTAMP:20260428T125816
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251124T140000
DTEND;TZID=Europe/Sofia:20251124T153000
DTSTAMP:20260428T125817
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251120T161500
DTEND;TZID=Europe/Sofia:20251120T173000
DTSTAMP:20260428T125817
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251119T140000
DTEND;TZID=Europe/Sofia:20251119T153000
DTSTAMP:20260428T125817
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:20251112T140000
DTEND;TZID=Europe/Sofia:20251112T153000
DTSTAMP:20260428T125817
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:20251111T140000
DTEND;TZID=Europe/Sofia:20251111T153000
DTSTAMP:20260428T125817
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:20251105T140000
DTEND;TZID=Europe/Sofia:20251105T153000
DTSTAMP:20260428T125817
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:20251104T150000
DTEND;TZID=Europe/Sofia:20251104T163000
DTSTAMP:20260428T125817
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:20251104T140000
DTEND;TZID=Europe/Sofia:20251104T153000
DTSTAMP:20260428T125817
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
END:VCALENDAR