Seminar in Operations Research, Probability and Statistics of IMI-BAS and Optimization Seminar of FMI-SU

Institute of Mathematics and Informatics, BAS Akad.G.Bonchev St, bl. 8, 1113, Sofia

On June 1st, 2026 (Monday) at 2:15 pm in room 503 of IMI-BAS a joint meeting will be held of the Operations Research, Probability and Statistics Seminar of IMI-BAS and the Optimization Seminar of the Faculty of Mathematics and Informatics, Sofia University. A talk on: On the subregularity of mappings associated to optimization problems will be delivered by Alberto Dominguez Corella, University of Graz, Austria. Abstract: This talk is meant as a nontechnical discussion on the concept of metric subregularity and its application to the study of stability in optimization problems. It features equivalences between the property and local error bounds, as well as theoretical applications, e.g., discretization, approximation, and differentiation with respect to parameters. We describe several concrete applications, including inverse problems and optimal control. [...]

ICMS Distinguished Lecture Series in Representation Theory and Mathematical Physics – Ivan Dimitrov, Lecture 3

Institute of Mathematics and Informatics, BAS Akad.G.Bonchev St, bl. 8, 1113, Sofia

ICMS Distinguished Lecture series in Representation Theory and Mathematical Physics Date and place: May 19 and 21, 2026 (15:00–16:00 Sofia time) and June 1, 3 and 5, 2026 (16:00–17:00 Sofia time), Room 403, IMI - BAS Lecturer: Ivan Dimitrov (Queen’s University, Canada) Title: Root systems, generalizations and applications Root systems were introduced by Wilhelm Killing in 1889 as a tool for classifying Lie algebras. Since then, they have become ubiquitous, appearing in various contexts in seemingly unrelated areas of Mathematics. In this lecture series, Ivan Dimitrov introduces and studies root systems and defines a generalization of root systems. He explains how this more general structure applies to various problems, e.g. hyperplane arrangements. Finally, he introduces and studies inversion sets of roots. The exposition is [...]

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