Съвместен семинар на секция "Анализ, геометрия и топология" и Международния център за математически науки – София (МЦМН-София) Concircularly Semi-Symmetric Metric Connection Miroslav Maksimović Университет на Прищина в Косовска Митровица, Косовска Митровица, Сърбия, и Институт по математика и информатика, Българска академия на науките 30 септември 2025 г., 11:00 ч. – Зала 403 Резюме. A concircularly semi-symmetric metric connection is a special class of semi-symmetric metric connection when its generator is a concircular vector. In this talk, we will present results on this connection on pseudo-Riemannian manifolds, and in particular, we will observe the application to Lorentzian manifolds and the theory of relativity. We demonstrate that a Lorentzian manifold reduces to a GRW space-time when the generator of the observed connection is a unit timelike vector. [...]

The International Center for Mathematical Sciences – Sofia (ICMS-Sofia) presents Recent Developments on Tropical Sandpiles and Related Subjects Tuesday, 23 September and Thursday, 25 September 2025 ICMS-Sofia, Room 403 and via Zoom You may find the details here: https://icms.bg/recent-developments-on-tropical-sandpiles-and-related-subjects/ In addition, we plan to have a “round table” meeting at room 378 on Wednesday, September 24, at 14:00, to openly exchange ideas while enjoying drinks and snacks.

The International Center for Mathematical Sciences – Sofia (ICMS-Sofia) presents Recent Developments on Tropical Sandpiles and Related Subjects Tuesday, 23 September and Thursday, 25 September 2025 ICMS-Sofia, Room 403 and via Zoom You may find the details here: https://icms.bg/recent-developments-on-tropical-sandpiles-and-related-subjects/ In addition, we plan to have a “round table” meeting at room 378 on Wednesday, September 24, at 14:00, to openly exchange ideas while enjoying drinks and snacks.

Съвместна сбирка на семинара на МЦМН и семинара "Анализ, геометрия и топология" в ИМИ, София, ще се проведе идния вторник, с доклад на Elia Fusi, както следва. Вторник, 22-ри юли, 13:00 часа, зала 403 на ИМИ-БАН. Elia Fusi, University of Torino: Special metrics in hypercomplex geometry Abstract:The existence of special hyperHermitian metrics plays an important role in the study of hypercomplex manifolds. In this talk, after a brief overview of the basic definitions in hypercomplex Geometry, we will discuss two of the main types of special metrics in the hypercomplex setting: quaternionic Gauduchon and strong HKT metrics. First of all, we will discuss sufficient and equivalent conditions for a quaternionic Gauduchon metric to exist.  Afterwards, we will show that strong HKT and balanced hyperHermitian metrics [...]

На 15 юли 2025 г. от 13:00 часа в зала 403 на ИМИ-БАН ще се проведе съвместно заседание на Общия семинар на секция "Анализ, геометрия и топология" и Международния център по математически науки (ICMS-Sofia). Доклад на тема: Weak Metric Structures on Generalized Riemannian Manifolds ще изнесе Milan Zlatanovic, University of Niš, Serbia. Резюме. Linear connections with torsion are important in the study of generalized Riemannian manifolds (M , G=g+F ), where the symmetric part g of G is a non-degenerate (0,2)-tensor and F is the skew-symmetric part. Some space-time models in theoretical physics are based on (M, G=g+F) , where F is defined using a complex structure. In the lecture, we will show more general models, where F has constant rank [...]