Yeshkeyev, A.R.; Tungushbayeva, I.O.; Amanbekov, S.M.(Karagandy University of the name of acad. E.A. Buketov, 2022)
This article is devoted to the study of Jonsson quasivarieties in a signature enriched with new predicate and constant symbols. New concepts of semantic Jonsson quasivariety and fragment-conservativeness of the center of ...
Kosmakova, M.T.; Izhanova, K.A.; Khamzeyeva, A.N.(Karagandy University of the name of acad. E.A. Buketov, 2022)
The paper deals with the second boundary value problem for the loaded heat equation in the first quadrant. The loaded term contains a fractional derivative in the Caputo sense of an order ; 2 < < 3. The boundary value ...
Kassym, A.S.; Kussainova, L.K.(Karagandy University of the name of acad. E.A. Buketov, 2022)
In this paper we study the problem of the best approximation by linear methods of solutions to one Triebel-type equation. This problem was solved by using estimates of the linear widths of the unit ball in corresponding ...
Kasimov, A.T.; Yessenbayeva, G.A.; Kasimov, B.A.; Yessenbayeva, G.A.; Khabidolda, O.(Karagandy University of the name of acad. E.A. Buketov, 2022)
In the article, an analytical and numerical study based on one modified refined bending theory is presented. By the finite difference method, a general numerical calculation algorithm is developed. The solution obtained ...
Kalimbetov, B.T.; Safonov, V.F.; Tuychiev, O.D.(Karagandy University of the name of acad. E.A. Buketov, 2022)
In the mathematical literature, a scalar integral equation with a degenerate kernel is well described (see below (1)), where all the written functions are scalar quantities). The authors are not aware of publications where ...
Huntul, M.J.; Tekin, I.(Karagandy University of the name of acad. E.A. Buketov, 2022)
Derivatives in time of higher order (more than two) arise in various fields such as acoustics, medical ultrasound, viscoelasticity and thermoelasticity. The inverse problems for higher order derivatives in time equations ...
Uteshova, R.Ye.; Kokotova, Ye.V.(Karagandy University of the name of acad. E.A. Buketov, 2022)
This paper deals with a problem of finding a bounded solution of a system of nonhomogeneous linear differential equations with an unbounded matrix of coefficients on a finite interval. The right-hand side of the equation ...
Attaev, A.K.; Ramazanov, M.I.; Omarov, M.T.(Karagandy University of the name of acad. E.A. Buketov, 2022)
The paper studies the problems of the correctness of setting boundary value problems for a loaded parabolic equation. The a feature of the problems is that the order of the derivative in the loaded term is less than or ...
Atakhan, N.; Nurpeisov, K.S.; Konisbayeva, K.T.(Karagandy University of the name of acad. E.A. Buketov, 2022)
The paper studies a two-point boundary value problem with unlimited boundary conditions for a linear singularly perturbed differential equation. Asymptotic estimates are given for a linearly independent system of solutions ...
Aripov, M.M.; Utebaev, D.; Nurullaev, Zh.A.(Karagandy University of the name of acad. E.A. Buketov, 2022)
Multiparametric difference schemes of the finite element method of a high order of accuracy for the Sobolevtype equation of the fourth-order in time are studied. In particular, the first boundary value problem for the ...
Bekmaganbetov, K.A.; Kervenev, K.Ye.; Toleugazy, Ye.(Karagandy University of the name of acad. E.A. Buketov, 2022)
The theory of embedding of spaces of differentiable functions studies important relations of differential (smoothness) properties of functions in various metrics and has wide application in the theory of boundary value ...
Yeshkeyev, A.R.; Tungushbayeva, I.O.; Omarova, M.T.(Karagandy University of the name of acad. E.A. Buketov, 2022)
This article is devoted to the study of the forcing companions of the Jonsson AP-theories in the enriched
signature. It is proved that the forcing companion of the theory does not change when expanding the theories
under ...
Tleubergenov, M.I.; Vassilina, G.K.; Seisenbayeva, S.R.(Karagandy University of the name of acad. E.A. Buketov, 2022)
Galiullin proposed a classification of inverse problems of dynamics for the class of ordinary differential
equations (ODE). Considered problem belongs to the first type of inverse problems of dynamics (of
the three main ...
Smadiyeva, A.G.(Karagandy University of the name of acad. E.A. Buketov, 2022)
This paper deals with the solving of initial-boundary value problems for the one-dimensional linear timefractional
diffusion equations with time-degenerate diffusive coefficients t with > 1 . The solutions
to ...
Shaimardan, S.; Tokmagambetov, N.S.; Aikyn, Y.(Karagandy University of the name of acad. E.A. Buketov, 2022)
A large number of the most diverse problems related to almost all the most important branches of
mathematical physics and designed to answer topical technical questions are associated with the use of
Bessel functions. ...
Muratbekov, M.B.; Bayandiyev, Ye.N.(Karagandy University of the name of acad. E.A. Buketov, 2022)
This paper investigates the question of the existence of solutions to the semiperiodic Dirichlet problem for
a class of singular differential equations of hyperbolic type. The problem of smoothness of solutions is ...
Soft topological polygroups are defined in two different ways. First, it is defined as a usual topology. In the
usual topology, there are five equivalent definitions for continuity, but not all of them are necessarily
...
Koshanov, B.D.; Kakharman, N.; Segizbayeva, R.U.; Sultangaziyeva, Zh.B.(Karagandy University of the name of acad. E.A. Buketov, 2022)
The need to study boundary value problems for elliptic parabolic equations is dictated by numerous practical
applications in the theoretical study of the processes of hydrodynamics, electrostatics, mechanics, heat
conduction, ...
Koilyshov, U.K.; Beisenbaeva, K.A.; Zhapparova, S.D.(Karagandy University of the name of acad. E.A. Buketov, 2022)
Partial differential equations of the parabolic type with discontinuous coefficients and the heat equation
degenerating in time, each separately, have been well studied by many authors. Conjugation problems for
time-degenerate ...
Igisinov, S.Zh.; Zhumaliyeva, L.D.; Suleimbekova, A.O.; Bayandiyev, ye.N.(Karagandy University of the name of acad. E.A. Buketov, 2022)
In this paper we study a class of degenerate elliptic equations with an arbitrary power degeneracy on
the line. Based on the research carried out in the course of the work, the authors propose methods to
overcome various ...