Yeshkeyev, A.R.; Yarullina, A.R.; Amanbekov, S.M.; Kassymetova, M.T.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
Given article is devoted to the study of semantic Jonsson quasivariety of universal unars of signature
containing only unary functional symbol. The first section of the article consists of basic necessary concepts.
There ...
Turgumbaev, M.Zh.; Suleimenova, Z.R.; Tungushbaeva, D.I.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
In this paper, we consider the questions about the weighted integrability of the sum of series with respect
to multiplicative systems with monotone coefficients. Conditions are obtained for weight functions that
ensure ...
Tileubayev, T.E.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
In this paper, we have solved several extremal problems of the best mean-square approximation of functions
f on the semiaxis with a power-law weight. In the Hilbert space L2 with a power-law weight t2 +1 we obtain
Jack ...
Seitmuratov, A.Zh.; Medeubaev, N.K.; Kozhoshov, T.T.; Medetbekov, B.R.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
When solving integrodifferential equations under boundary conditions, taking into account physical nonlinearity,
a broad class of boundary-value problems of oscillations arises associated with various boundary
conditions ...
Qureshi, M.I.; Malik, S.H.; Ahmad, D.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The main objective of this article is to provide the analytical solutions (not previously found and not
available in the literature) of some problems related with definite integrals integrands of which are the
products ...
Omkar, R.; Lalu, M.; Phaneendra, K.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
This paper addresses the solution of a differential-difference type equation having an interior layer behaviour.
A difference scheme is suggested to solve this equation using a non-standard finite difference method. ...
Matin, D.T.; Akhazhanov, T.B.; Adilkhanov, A.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The paper considers Morrey-type local spaces from LMw
p The main work is the proof of the commutator compactness theorem for the Riesz potential [b; I ] in local Morrey-type spaces from LMw1 p to LMw2 q . We also give ...
Manat, A.M.; Orumbayeva, N.T.(Karagandy University of the name of acad. E.A. Buketov, 2022-06-30)
The paper investigates a non-local boundary value problem for the Benjamin-Bona-Mahony equation.
This equation is a nonlinear pseudoparabolic equation of the third order with a mixed derivative. To find a
solution to ...
Kosmakova, M.T.; Izhanova, K.A.; Kasymova, L.Zh.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
In the paper, the boundary value problem for the loaded heat equation is solved, and the loaded term
is represented as the Riemann-Liouville derivative with respect to the time variable. The domain of the
unknown function ...
Dekhkonov, F.N.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
In this paper, we consider a boundary control problem for a parabolic equation in a segment. In the part of
the domain’s bound it is a given value of the solution and it is required to find controls to get the average
value ...
Bokayev, N.A.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The paper considers the space of generalized fractional-maximal function, constructed on the basis of
a rearrangement-invariant space. Two types of cones generated by a nonincreasing rearrangement of a
generalized ...
Basheyeva, A.O.; Lutsak, S.M.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The existence of a finite identity basis for any finite lattice was established by R. McKenzie in 1970, but the
analogous statement for quasi-identities is incorrect. So, there is a finite lattice that does not have a ...
Attaev, A.Kh.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The work is devoted to the problem of setting new boundary and internal boundary value problems for
hyperbolic equations. The consideration of these settings is given on the example of a wave equation.
The research ...
Aisagaliev, S.; Korpebay, G.T.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The paper proposes a method for solving the problem of optimal performance for linear systems of ordinary
differential equations in the presence of phase and integral restrictions, when the initial and final states
of ...
Adil, N.; Berdyshev, A.S.(Karagandy University of the name of acad. E.A. Buketov, 2023-06-30)
The paper investigates the issues of solvability and spectral properties of local and nonlocal problems for
the fractional order diffusion-wave equation. The regular and strong solvability to problems stated in the
domains, ...
Yucel, M.; Muhtarov, F.S.; Mukhtarov, O.Sh.(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
The main goal of this study is to adapt the classical differential transformation method to solve new types
of boundary value problems. The advantage of this method lies in its simplicity, since there is no need
for ...
Yakar, А.; Kutlay, H.(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
This paper deals with some differential inequalities for generalized fractional integro-differential equations
by using the technique of upper and lower solutions. The fractional differential operator is taken in ...
Tokmagambetova, T.D.; Orumbayeva, N.T.(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
In a rectangular domain, we consider a boundary value problem periodic in one variable for a system
of partial differential equations of hyperbolic type. Introducing a new unknown function, this problem is
reduced to an ...
Sinsoysal, B.; Rasulov, M.; Iskenderova, R.(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
A new numerical method is proposed for solving the generalized Buckley-Leverett problem, which describes
the movement of two-phase mixtures of Bazhenov bed sediments in a class of discontinuous functions. To
this end, ...
Salim, S.H.; Jwamer, K.H.F.; Saeed, R.K.(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
Using the natural cubic spline function, this paper finds the numerical solution of Volterra-Fredholm integral
equations of the second kind. The proposed method is based on employing the natural cubic spline function
of ...