An online session of the seminar will be held on December 15, 2020 (Tuesday) at 3:00 p.m. A talk on Hagedorn transitions in Matrix Membranes will be delivered by Denjoe O'Connor (School of Theoretical Physics, Dublin Institute for Advanced Studies). Abstract. Matrix models that originate in non-commutative deformations of Membranes result in models related to dimensional reductions of higher dimensional Yang-Mills theories. The confining/deconfining transition becomes a Hagedorn transition in this setting and the models are believed to have gravitational duals. I will discuss recent progress in understanding these models and their physics. The seminar will be held via Zoom and everyone can join via the link: https://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 Topic: Онлайн семинар на секция "Алгебра и логика" Time: Dec 15, 2020 03:00 PM Sofia Meeting ID: [...]

An online session of the seminar will be held on December 11, 2020 (Friday) at 1:00 p.m. A talk on Margarete Wolf, Symmetric Polynomials in Noncommuting Variables and Noncommutative Invariant Theory will be delivered by Silvia Boumova (FMI-SU and IMI-BAS). (Joint project with Vesselin Drensky) Satellite talk to the Webinar Women in Mathematics in South-Eastern Europe organized by the International Center for Mathematical Sciences - Sofia. The seminar will be held via Zoom and everyone can join via the link: https://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 Topic: Онлайн семинар на секция "Алгебра и логика" Time: Dec 11, 2020 01:00 PM Sofia Meeting ID: 851 3737 5021 Passcode: 035647 Algebra and Logic Department, IMI-BAS http://www.math.bas.bg/algebra/seminarAiL/  

An online session of the seminar will be held on December 4, 2020 (Friday) at 1:00 p.m. A talk on Polynomial identities: anomalies of codimension growth will be delivered by Mikhail Zaicev (Moscow State University). The seminar will be held via Zoom and everyone can join via the lin: https://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 Meeting ID: 851 3737 5021 Passcode: 035647 Abstract We consider numerical invariants associated with polynomial identities of algebras over a field of characteristic zero. Given an algebra A, one can construct a sequence of non-negative integers {c_n(A)}, n = 1, 2, . . . , called the codimensions of A, which is an important numerical characteristic of identical relations of A. In the present talk, we discuss asymptotic behavior of codimension sequence in different [...]

An online session of the seminar will be held on October 30, 2020 (Friday) at 1:00 p.m. A talk on A Solvable Class of Solution Concepts for Multiplayer Complete Information Infinite Games with Ordered Objectives and Temporary Coalitions will be given by Dimitar Guelev (IMI-BAS). The seminar will be held via Zoom and everyone can join via the lin: https://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 Topic: Онлайн семинар на секция "Алгебра и логика" Time: Oct 30, 2020 01:00 PM Sofia Meeting ID: 851 3737 5021 Passcode: 035647 Algebra and Logic Department, IMI-BAS http://www.math.bas.bg/algebra/seminarAiL/  

On Decemner 13, 2019 (Friday) at 1:00 p.m. in Room 578 of the Institute of Mathematics and Informatics Senior Assistant Professor Peter Danchev (IMI-BAS) will present his dissertation for the scientific degree Doctor of Science on Some Classes of Noncommutative Rings and Abelian Groups Everybody is invited. Algebra and Logic Department, IMI-BAS  

The next meeting of the Algebra and Logic Seminar will be held on November 29, 2019 (Friday) at 1:00 p.m. in Room 578 of the Institute of Mathematics and Informatics. A talk on Before we can find a model, we must forget about perfection will be delivered by Dimiter DOBREV. Everybody is invited.  

The next meeting of the Algebra and Logic Seminar will be held on November 22, 2019 (Friday) at 1:00 p.m. in Room 578 of the Institute of Mathematics and Informatics. A talk on Diophantine and cohomological dimension of fields of arithmetic type will be delivered by Ivan CHIPCHAKOV. Everybody is invited.  

The next meeting of the Algebra and Logic Seminar will be held on November 15, 2019 (Friday) at 1:00 p.m. in Room 578 of the Institute of Mathematics and Informatics. A talk on First-order theory of Euclidean plane, based on lines as only primitive notion will be delivered by Tatyana IVANOVA. Everybody is invited. Abstract. The paper [1] gives qualitative spatial reasoning in Euclidean plane based solely on lines. The relations of parallelism and convergence between lines are considered. In this presentation I consider a continuation of [1] by adding a new predicate - perpendicularity. I introduce a first-order theory of lines in Euclidean plane with predicates parallelism, convergence and perpendicularity. The logic is complete with respect to the Euclidean plane, ω - categorical and [...]