News & Events - SDU University

Date and location	Speaker and topic
14 December 2022	Birzhan Ayanbayev (SDU University, Kazakhstan) Some problems of the vectorial calculus of variations in L^\infty I will talk about some problems in Vectorial Calculus of Variation in L^\infty. This topic was introduced by Gunnar Aronsson in 1960s in one dimensional case. He first studied the relation between \infty laplacian and the absolute minimisers, where the infinity Laplacian plays a role similar to Euler Lagrange equation. Recently in 2010s Nikos Katzourakis proposed an extension of the Aronsson’s equation to vectorial case (N-dimensions with N\geq 2). In this talk we will discuss the history of the problem, some results in high dimensions with classical solutions and technical challenges of the deriving the “best’’ vectorial \infinity laplacian.
21 December 2022	Duvan Cardona (Ghent University, Belgium) Control theory for diffusion models on compact manifolds Over the years, in control theory, the null-controllability of diffusion models for (non-local) elliptic pseudo-differential operators has been an open problem. We will discuss the recent progress on it in the case of closed manifolds
28 December 2022	Madi Yergaliyev (Al-Farabi Kazakh National University and Institute of Mathematics and Mathematical Modeling, Kazakhstan) On an inverse problem with an integral overdetermination for the Burgers equation In the work we consider one inverse problem for the Burgers equation with an integral overdetermination and periodic boundary conditions. In the course of solving the inverse problem, we reduce it to investigation the initial boundary value problem for the loaded Burgers equation. For the latter theorem on its unique solvability in Sobolev classes is proved by the methods of Faedo-Galerkin, a priori estimates and functional analysis. Further, the theorems on the unique solvability of the initial inverse problem are also proved. Graphs of the solution to the initial boundary value problem for the loaded Burgers equation and the desired function of the inverse problem are presented

Date and location	Speaker and topic
13 February 2023	Juan Pablo Velasquez Rodriguez (Ghent University, Belgium) Harmonic analysis on locally profinite groups The purpose of this talk is to give a brief introduction to the analysis based on the Vladimirov-Taibleson operator on locally profinite groups, and to explain the way the Vladimirov-Taibleson operator plays an analogous role to the Laplacian on Lie groups, even though properties of pseudo-differential operators on locally connected spaces differ a lot from the totally disconnected case. In order to give some motivation on this topic, we will start off by discussing the Vladimirov operator on the field of p-adic numbers and some interesting pseudo-differential equations associated to it. We will consider the generalizations of this operator to several dimensions and, after discussing a little bit about the representation theory of locally profinite groups, we will move on to the more interesting non commutative case where the group Fourier transform will be our main tool
27 February 2023	Bauyrzhan Derbissaly (Al-Farabi Kazakh National University and Institute of Mathematics and Mathematical Modeling, Kazakhstan) Green’s function of asymmetric characteristic initial boundary value problems for a hyperbolic equation The talk is devoted to studying and constructing the Green’s function of various asymmetric characteristic initial-boundary value problems for a general second-order hyperbolic equation with variable coefficients
27 February 2023	Bauyrzhan Derbissaly (Al-Farabi Kazakh National University and Institute of Mathematics and Mathematical Modeling, Kazakhstan) Green’s function of asymmetric characteristic initial boundary value problems for a hyperbolic equation The talk is devoted to studying and constructing the Green’s function of various asymmetric characteristic initial-boundary value problems for a general second-order hyperbolic equation with variable coefficients
27 February – 4 March, 2023	Data Science Week, held from 27.02.2023-04.03.2023, was a highly successful event that aimed to raise interest and awareness among students about the data science field. The event featured a wide range of activities, including guest lectures, mini games, quests, and hackathons. One of the major highlights of the event was the five guest lectures delivered by Tele2, FCB, Technodom, and Professor Ejaz Ahmed from The Brock University in Canada. These lectures provided valuable insights into the field of data science and the various career opportunities available to students in this area. Another major activity during the event was the hackathon, which involved students completing tasks from FCB and Technodom. The top three teams were awarded prizes such as smart watches, wireless headphones, and Yandex speakers, which added to the excitement and enthusiasm of the participants. Overall, the event was a great success in terms of achieving its goal of raising awareness and interest in data science among students. We hope to organize more such events in the future and continue to inspire young minds to pursue careers in this exciting and rapidly evolving field.

Date and location	Speaker and topic
Thursday 9 March from 11.00 to 13.00 Allvet, G219 Friday 10 March from 11.00 to 13.00 FENS Meeting room, F209	Topic 1: “Some results and open questions concerning axial algebras” Topic 2: “Universal enveloping algebra of a pair of compatible Lie brackets” The faculty of Engineering and Natural Sciences is going to host a series of two research seminars from the invited guest Vsevolod Gubarev (h-index 6), who is a specialist in ring theory and represents the famous Novosibirsk school of A.I. Shirshov in Combinatorial Ring Theory. In 2015, he defended his dissertation under the supervision of P.S. Kolesnikov. From 2017 to 2019, he was a postdoctoral researcher at the University of Vienna under the supervision of D. Burde. Since 2019, he has been working as a senior research fellow at the Sobolev Institute of Mathematics of the Siberian Branch of the Russian Academy of Sciences. Since 2011, he has been teaching at Novosibirsk State University, and since 2022, he has held the position of Associate Professor. To date, he has written more than 30 articles, supervised two students at NSU in their diploma theses, and in 2022, he co-authored a textbook with P.S. Kolesnikov.
Research talk 10:00-11:00 Mini Red Hall General audience talk 14:00 – 15:00, Allvet G219	The Department of Mathematics and Natural Sciences is welcoming professor Salah Mehdi from the Université de Lorraine in France, who is currently a visiting professor at the New York University in Abu Dhabi. He is also the head of a research team of the CNRS, France and his field of research is Representation theory of Lie groups and its applications, especially to Physics. During his visit, the professor will provide two talks: Dirac: from electrons to Lie groups. Abstract: In 1928, the Nobel laureate Paul Dirac stated an equation describing the quantum relativistic kinematics of a spinning free electron on the Minkowski spacetime. This equation involves a differential operator with coefficients in a Clifford algebra with symmetries encoded by a Lie group. It turns out that the Dirac operator is a powerful tool to bridge quantum physics, geometry and representations of Lie groups. In this talk, I will first describe the emergence of the Dirac operator, then I will explain how one can use Dirac operators to address important problems in representations theory, such as cohomology, geometric realization, classification, nilpotent orbits or asymptotic behavior of characters. In particular, we will present recent results jointly with P. Pandzic, D. Vogan and R. Zierau. Symmetries: a mathematical formalism or a natural principle? Abstract: Symmetries have always been a source of inspiration and a strong guiding principle for scientists and artists. A symmetry, such as a rotation, a translation or a reflection, is a mapping which preserves the shape or the structure of an object. In this talk, I will describe how symmetries gave birth to fundamental mathematical concepts and how, in turn, this mathematical formalism can be used to understand better symmetries. Finally, we will discuss the role of symmetries in arts and we will question the existence of a natural principle of symmetry. The talk is intended for a general audience, everyone is welcome.
27 March 2023	Bolys Sabitbek (Queen Mary University of London, UK) TBA
10 April 2023	Penpark Sirimark (Rajamangala University of Technology Isan, Thailand) TBA