ESSN 2313-6022 (электронное издание), ISSN 1997-1397 (печатное издание)

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  • Local Asymptotic Normality of Statistical Experiments in an Inhomogeneous Competing Risks Model 

    Abdushukurov, Abdurahim A.; Nurmukhamedova, Nargiza S.; Абдушукуров, Абдурахим А.; Нурмухамедова, Наргиза С. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    In this paper we consider an inhomogeneous competing risks model. For the likelihood ratio statistics (LRS), proved the theorem on the locally asymptotic normality of statistical experiment
  • Sharply Doubly Transitive Groups with Saturation Conditions 

    Sozutov, Anatoliy I.; Durakov, Evgeny B.; Созутов, Анатолий И.; Дураков, Евгений Б. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    A number of conditions were found under which a sharply doubly transitive permutation group has an abelian normal divider
  • Maximal Abelian Ideals and Automorphisms of Nonfinitary Nil-triangular Algebras 

    Sotnikova, Elena A.; Сотникова, Елена А. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    We study mutually connected automorphisms and abelian ideals of nonfinitary nil-triangular algebras
  • Unsteady Flow of two Binary Mixtures in a Cylindrical Capillary with Changes in the Internal Energy of the Interface 

    Sobachkina, Natalya L.; Собачкина, Наталья Л. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    The problem of two-dimensional unsteady flow of two immiscible incompressible binary mixtures in a cylindrical capillary in the absence of mass forces is studied. The mixtures are contacted through a common interface on ...
  • Second Hankel Determinant for Bi-univalent Functions Associated with q-differential Operator 

    Shrigan, Mallikarjun G.; Шриган, Малликарджун Г. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    The objective of this paper is to obtain an upper bound to the second Hankel determinant denoted by H2(2) for the class S q ( ) of bi-univalent functions using q-differential operator
  • Computational Modeling of the Electromagnetic Field Distribution of a Horizontal Grounded Antenna in Rock for TTE Communication 

    Shaidurov, Georgy Ya.; Kokhonkova, Ekaterina A.; Шайдуров, Георгий Я.; Кохонькова, Екатерина А. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    The article investigates the spatial distribution of the electromagnetic (EM) field of an an- tenna in the form of a long grounded cable in a rock with the corresponding electrophysical parameters. The frequency dependences ...
  • Dehn Functions and the Space of Marked Groups 

    Shahryari, Mohammad; Шахриари, Мохаммед (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    In the space of marked group, we suppose that a sequence (Gi;Xi) converges to (G;X), where G is finitely presented. We obtain an inequality which connects Dehn functions of Gis and G
  • Two-dimensional Inverse Problem for an Integro-differential Equation of Hyperbolic Type 

    Safarov, Jurabek Sh.; Сафаров, Журабек Ш. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    A multidimensional inverse problem of determining the kernel of the integral term of an integro-differential wave equation is considered. In the direct problem it is required to find the dis- placement function from the ...
  • Irreducible Carpets of Additive Subgroups of Type G2 Over a Field of Characteristic 0 

    Nuzhin, Yakov N.; Troyanskaya, Elizaveta N.; Нужин, Яков Н.; Троянская, Елизавета Н. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    It is proved that any irreducible carpet of type G2 over a field F of characteristic 0, at least one additive subgroup of which is an R-module, where F is an algebraic extension of the field R, up to conjugation by a ...
  • Uniqueness of an Interpolating Entire Function with Some Properties 

    Mkrtchyan, Aleksandr J.; Мкртчян, Александр Д. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    We consider the problem of power series analytic continuation by coefficients interpolation by entire or meromorphic functions. We prove uniqueness of an interpolating function with some properties. Also, under assumptions ...
  • Tutorial on Rational Rotation C*-Algebras 

    Lawton, Wayne M.; Лоутон, Уэйн М. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    The rotation algebra A is the universal C -algebra generated by unitary operators U; V satisfying the commutation relation UV = !V U where ! = e2 i : They are rational if = p=q with 1 6 p 6 q1; othewise irrational. ...
  • Some Solutions of the Euler System of an Inviscid Incompressible Fluid 

    Kaptsov, Oleg V.; Капцов, Олег В. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    We consider a system of two-dimensional Euler equations describing the motions of an inviscid incompressible fluid. It reduces to one non-linear equation with partial derivatives of the third order. A group of point ...
  • Existence and Uniqueness of the Solution to a Class of Fractional Boundary Value Problems Using Topological Methods 

    Faree, Taghareed A.; Panchal, Satish K.; Фари, Тагарид А.; Панчал, Сатиш К. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    This paper investigates the existence and uniqueness of solutions to boundary value prob- lems involving the Caputo fractional derivative in Banach space by topological structures with some appropriate conditions. It is ...
  • Determination of Non-stationary Potential Analytical with Respect to Spatial Variables 

    Durdiev, Durdimurod K.; Totieva, Zhanna D.; Дурдиев, Дурдимурод К.; Тотиева, Жанна Д. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    The inverse problem of determining coefficient before the lower term of the hyperbolic equation of the second order is considered. The coefficient depends on time and n spatial variables. It is supposed that this coefficient ...
  • Study of a Deformation Localization Direction in Slow Motion of a Granular Medium 

    Kuzovatova, Olga I.; Кузоватова, Ольга И. (Сибирский федеральный университет. Siberian Federal University, 2022-10)
    This paper is devoted to the study of the direction of the deformation localization lines in a slow gravity flow of a granular medium in convergent channels with various geometric characteristics. Variational principles ...
  • Modeling of a Differential Laser Sensing System for Detecting Low Concentrations of Methane in the Surface Layer 

    Verkhoshentseva, Svetlana L.; Tsipotan, Aleksey S.; Nepomnuashy, Oleg V.; Slabko, Vitaly V.; Верхошенцева, Светлана Л.; Ципотан, Алексей С.; Непомнящий, Олег В.; Слабко, Виталий В. (Сибирский федеральный университет. Siberian Federal University, 2022-08)
    The relevance of research is due to the need for remote monitoring of the atmosphere for the presence of suspended matter. The application of this method for exploration in geo-prospecting will make it possible to identify ...
  • A Nonlocal Problem for a Third Order Parabolic-Hyperbolic Equation with a Singular Coefficient 

    Urinov, Akhmadjon K.; Khalilov, Kobiljon S.; Уринов, Ахмаджон К.; Халилов, Кобилжон С. (Сибирский федеральный университет. Siberian Federal University, 2022-08)
    Non-classical problem with an integral condition for parabolic-hyperbolic equation of the third order is formulated and studied in this paper. The unique solvability of the problem was proved using the method integral ...
  • Integration of Mathematical and Computer Simulation Modeling in Engineering Education 

    Skafa, Elena I.; Evseeva, Elena G.; Korolev, Mark E.; Скафа, Елена И.; Евсеева, Елена Г.; Королев, Марк Е. (Сибирский федеральный университет. Siberian Federal University, 2022-08)
    The development of modern engineering, technology, science and education is impossible without the use of computer mathematics systems. Nowadays, an engineer should be equally proficient in both methods of mathematical ...
  • Numerical-and-analytic Method for Solving Cauchy Problem of One-dimensional Gas Dynamics 

    Senashov, Sergei I.; Savostyanova, Irina L.; Cherepanova, Olga N.; Сенашов, Сергей И.; Савостьянова, Ирина Л.; Черепанова, Ольга Н. (Сибирский федеральный университет. Siberian Federal University, 2022-08)
    The equations describing the flow of a one-dimensional barotropic perfect gas are considered in this paper. Conservation laws of a special kind were found for these equations. The Cauchy problem is reduced to several ...
  • Estimates for Mittag-Leffler Functions with Smooth Phase Depending on Two Variables 

    Safarov, Akbar R.; Сафаров, Акбар Р. (Сибирский федеральный университет. Siberian Federal University, 2022-08)
    In this paper we consider the problem on estimates for Mittag-Leffler functions with the smooth phase functions of two variables having singularities of type D∞, D ± 4 and Ar. The generalisation is that we replace the ...

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