Кога и къде: 12.01.2026 г., понеделник, от 14:00 ч. в зала 578 на ИМИ - БАН Докладчик:  Валдемар Цанов (ИМИ - БАН) Заглавие на доклада: Geometry of Milnor fibrations of equivariant plane curves Резюме: 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.

Дата и място: Вторник, 20.01.2026 г., 13:00 ч., Зала 403, ИМИ - БАН Докладчик: Bogdan Đorđević (Serbian Academy of Arts and Sciences) Заглавие: Applications of Banach algebras and Banach modules to some contemporary analysis problems Abstract: In 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 [...]

Дата и място: Вторник, 27.01.2026 г., 13:00 ч., Зала 403, ИМИ - БАН Докладчик: Jean-Pierre Gazeau (Université Paris Cité, CNRS, and University of Białystok) Заглавие: Spectral and angular variables for open qudit dynamics Abstract:  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. A key outcome of this parametrization is a partial decoupling of the GKLS evolution: while the angular variables are driven by both the [...]

Отложената лекция на тема Tropical curves with applications от Петър Петров (ИМИ-БАН), ще бъде представена на Семинара по геометрия на МЦМН в сряда, 25 февруари 2026 г., от 14:00 часа  в зала 403 и чрез Zoom. Повече подробности можете да намерите тук: https://icms.bg/tropical-curves-with-applications-geometry-seminar-talk-by-petar-petrov-2/ Връзка към Zoom: https://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1

Two lectures by Milen Yakimov, chair of the group on Cluster Algebras and Quantum Groups at the ICMS, IMI-BAS. Tuesday, March 10, at 13:00 in room 403, IMI-BAS. Cluster structures on quantum groups and the full Berenstein-Zelevinsky conjecture Tuesday, March 17, at 13:00 in room 403, IMI-BAS. Reflective centres of module categories and quantum K-matrices Abstracts: March 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. [...]

Лекция на тема Algebraic Curves and Brill–Noether Theory от Turgay Akyar (ИМИ-БАН), ще бъде представена на Семинара по геометрия на МЦМН в сряда, 11 март 2026 г., от 14:00 часа  в зала 278 и чрез Zoom. Повече подробности можете да намерите тук: https://icms.bg/algebraic-curves-and-brill-noether-theory-geometry-seminar-talk-by-turgay-akyar/ Връзка към Zoom: https://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1

Two lectures by Milen Yakimov, chair of the group on Cluster Algebras and Quantum Groups at the ICMS, IMI-BAS. Tuesday, March 10, at 13:00 in room 403, IMI-BAS. Cluster structures on quantum groups and the full Berenstein-Zelevinsky conjecture Tuesday, March 17, at 13:00 in room 403, IMI-BAS. Reflective centres of module categories and quantum K-matrices Abstracts: March 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. [...]

Лекция на тема Distribution and Correlation of Polynomial Farey Fractions от Sneha Chaubey (Indraprastha Institute of Information Technology) ще бъде представена на Семинара по геометрия на МЦМН в сряда, 18 март 2026 г., от 14:00 часа  в зала 403 и чрез Zoom. Повече подробности можете да намерите тук: https://icms.bg/distribution-and-correlation-of-polynomial-farey-fractions-geometry-seminar-talk-by-sneha-chaubey/ Връзка към Zoom: https://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1

Поредната сбирка на Националния семинар по стохастика ще се проведе на 18 март 2026 г. (сряда) от 14:00 часа в зала 503 на ИМИ - БАН. Доклад на тема Large deviation estimates related arcsine laws for subordinators ще изнесе Toru Sera (University of Osaka). Повече информация за доклада можете да намерите тук: http://www.math.bas.bg/~statlab/NSPS/  

Поредната сбирка на семинара Дидактическо моделиране ще се проведе на 23.03.2026 г. от 14:30 ч. в зала 278 на ИМИ. Доклад на тема Анализ на резултатите от Областния кръг на НОМ за 4. - 7. клас през 2026 г. ще изнесат Невена Събева и Боянка Савова. Линк за Zoom: https://us06web.zoom.us/j/85301210701?pwd=EbSkFBRiNmawJ9AEE8u6saNroAGr1G.1 Meeting ID: 853 0121 0701 Passcode: 274471

Втора лекция на тема Algebraic Curves and Brill–Noether Theory от Turgay Akyar (IMI-BAS) ще бъде представена на Семинара по геометрия на МЦМН в сряда, 25 март 2026 г., от 14:00 часа  в зала 578 и чрез Zoom. Повече подробности можете да намерите тук: https://icms.bg/algebraic-curves-and-brill-noether-theory-geometry-seminar-talk-by-turgay-akyar-2/ Връзка към Zoom: https://us02web.zoom.us/j/86186281353?pwd=6CARUygJaA3HiTNAt3norZQRFt8fIL.1