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National Coding Theory workshop “Professor Stefan Dodunekov”

St. Ekaterina Garden Hotel

The National Coding Theory workshop with international participation "Profesor Stefan Dodunekov" will be held from 4th to 7th December 2025 in St. Ekaterina Garden Hotel in the village of Ribaritsa. The scientific program will be held on December 5th and 6th and will include short talks (up to 20 minutes), thesis presentations (up to 40 minutes) and discussions. To participate in the scientific program, please send a title and a short abstract (up to one page) to Peter Boyvalenkov, peter@math.bas.bg, and to Tsonka Baicheva, tsonka@math.bas.bg, before 23.11.2025. The workshop includes the annual reports session of the Mathematical Foundations of Informatics Department, IMI-BAS, too. PROGRAMME

Seminar in Operations Research, Probability and Statistics

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

On December 09, 2025 (Tuesday) at 14:15 in room 503 of IMI-BAS and online via Zoom Dr. Sebastian Tapia Garcia, research unit Variational Analysis, Dynamics and Operations Research, Vienna University of Technology will give a talk at the Operations Research, Probability and Statistics Seminar on: Differentiable functions with surjective generalized Jacobians. Abstract: 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 [...]

Annual Scientific Session of the Algebra and Logic Department

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

The annual Scientific Session of the Department of Algebra and Logic will be held on December 12th (Friday) at 9:45 am in Room 578 of IMI - BAS. Programme 9:45 – 10:00 Opening 10:00 – 10:20 Vesselin Drensky: Dihedral invariants of the free associative algebra of rank two (joint results with Silvia Boumova and Şehmus Fındık). 10:20 – 10:50 Tatiana Gateva-Ivanova: Finite idempotent braided sets and their quadratic algebras 10:50 – 11:00 Break 11:00 – 11:20 Emil Kolev: Covering problems 11:20 – 11:40 Ivan Chipchakov: Application of primary tensor product decompositions to the normality question for locally finite-dimensional central division algebras 11:40 – 11:50 Break 11:50 – 12:10 Veselin Filev: Holographic flavour and neural networks 12:10 – 12:30 Elitza Hristova: Tensor products of Lie [...]

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