Семинарът по МАТЕМАТИЧЕСКИ ОСНОВИ НА ИНФОРМАТИКАТА организиран от Секция „Математически основи на информатиката“ към ИМИ - БАН и Факултет „Математика и информатика“ - ВТУ, Ви кани на поредната сбирка на 8 януари 2025 г. от 17:00 часа в зала 401 на корпус 4 на ВТУ, на която Prof. Ferruh Özbudak Sabancı University Faculty of Engineering and Natural Sciences, İstanbul - Turkiye ще изнесе доклад на тема: Generalizing the Bierbrauer—Friedman bound to mixed-level orthogonal arrays (joint work with Denis Krotov and Vladimir Potapov) Abstract: We characterize mixed-level orthogonal arrays it terms of algebraic designs in a special multigraph. We prove a mixed-level analog of the Bierbrauer--Friedman (BF) bound for pure-level orthogonal arrays and show that arrays attaining it are radius-1 completely regular codes (equivalently, intriguing sets, […]

Дата: 14.01.2025 г., 14:00 ч. Място: Зала 403, ИМИ - БАН Докладчик: Jean-Pierre Gazeau от Université Paris-Cité Доклад: Regularized Quantum Motion in a Bounded Set: Hilbertian Aspects Допълнителна информация: https://icms.bg/regularized-quantum-motion-in-a-bounded-set-hilbertian-aspects-talk-by-jean-pierre-gazeau/ Резюме. It is well known that the momentum operator canonically conjugated to the position operator for a particle confined within a bounded interval of the line (with Dirichlet boundary conditions) is not essentially self-adjoint, as it possesses a continuum of self-adjoint extensions. In this talk, we demonstrate that essential self-adjointness can be restored by symmetrically weighting the momentum operator with a positive bounded function that approximates the indicator function of the given interval. This weighted momentum operator arises naturally from a similarly weighted classical momentum through the Weyl-Heisenberg covariant integral quantization of functions or distributions. Reference: […]

Поредната сбирка на СЕМИНАРА на секция "Математическо моделиране и числен анализ" ще се състои на  30.01.2025 г. (четвъртък) от 14:00 часа по Zoom. Доклад на тема: Some mathematical aspects of simulation modeling of physiological processes in plants ще изнесе Dr. Alex Topaj (Bureau Hyperborea Ltd). Резюме: The contribution presents the author's experience of using mathematical methods to describe plant physiology processes in applied crop models. In contrast to the simplified data-based empirical approach, the mechanistic description of plant vital processes in theory allows us to obtain new knowledge and to develop the universal crop models with parameters having physical meaning. Such explanatory models, in addition to the traditional cause-and-effect method (the flow-balance approach, leading to systems of differential or difference equations), can also successfully apply […]