Taskin, A.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-09-30)
In this study, the time-dependent source identification problem for the two-dimensional neutron transport
equation was studied. For the approximate solution of this problem a first order of accuracy difference
scheme was ...
Olgar, H.; Muhtarov, F.; Mukhtarov, O.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-09-30)
This paper is devoted to a new type of boundary-value problems for Sturm-Liouville equations defined
on three disjoint intervals ( ; + d); ( + d; d) and ( d; ) together with eigenparameter
dependent ...
Valiyev, A.A.; Valiyev, M.B.; Huseynov, E.H.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-09-30)
In the article the spectrum and resolvent of the so-called multichannel systems with nonzero internal
energies were investigated. The spectrum and resolvent of multichannel Sturm-Liouville systems with nonzero
internal ...
Ismoilov, M.B.; Sharipov, R.A.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
The theory of m-convex (m cv) functions is a new direction in the real geometry. In this work, by using
the connection m cv functions with strongly m-subharmonic (shm) functions and using well-known and
rich properties ...
Aisagaliev, S.; Korpebay, G.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
A new method for solving the problem of controllability and optimal transient behavior of nonlinear systems
subject to boundary conditions and constraints on control values was proposed. Unlike existing methods,
this new ...
Ashyralyyev, C.; Ashyralyyeva, T.A.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
We study a source identification boundary value problem for a parabolic partial differential equation with
multi-point Neumann type boundary condition. Stability estimates for the solution of the overdetermined
mixed BVP ...
Ashyralyev, A.; Ibrahim, S.; Hincal, E.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
This paper examines the initial value problem for a third-order delay partial differential equation with
involution and Robin boundary condition. We construct a first-order accurate difference scheme to obtain
the numerical ...
Ashyraliyev, M.; Ashyralyyeva, M.A.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
In the present paper, we construct a first order of accuracy difference scheme for the approximate solution of
the inverse problem for telegraph-parabolic equations with an unknown spacewise dependent source term.
The ...
Ashurov, R.R.; Fayziev, Yu.E.; Khudoykulova, M.U.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
In recent years, the fractional partial differential equation of the Boussinesq type has attracted much
attention from researchers due to its practical importance. In this paper, we study a non-local problem
for the ...
Artykbaev, A.; Toshmatova, M.M.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
The construction of new railway lines is based on the railway plan. There are various ways to draw up
a railway plan. The basis of all railway plans is a scheme of geometric point locations, the projection of
the center ...
Kutlay, H.; Yakar, A.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
In the study the existence of solutions of a class of fractional integro-differential equations with boundary
conditions was considered. The main tool, we employ, is the conventional monotone iterative technique,
which ...
Kerimbekov, A.; Asanova, Zh.K.; Baetov, A.K.(Karagandy University of the name of academician E.A. Buketov, 2024-09-30)
In the article the problem of synthesizing uniformly distributed optimal control for nonlinear optimization
of oscillatory processes described by integro-differential partial differential equations with the Volterra
integral ...
Aripov, M.M.; Utebaev, D.; Utebaev, B.D.; Yarlashov, R.Sh.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-09-30)
The issues of stability in solving nonlinear difference equations were considered. Based on a generalized
difference analog of the well-known Bihari lemma, stability conditions for a trivial solution based on initial
data ...
Aliyev, N.; Rasulov, M.; Sinsoysal, B.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-09-30)
This study is devoted to the study of the solution of a boundary value problem for an ordinary linear
differential equation of half order with constant coefficients. Using of the fundamental solution of the main
part of ...
Ulbrikht, O.I.; Urken, G.A.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
The work is related to the study of the model-theoretic properties of Jonsson theories, which, generally
speaking, are not complete. In the article, on the Boolean of Jonsson subsets of the semantic model of
some fixed ...
Turgumbaev, M.Zh.; Suleimenova, Z.R.; Mukhambetzhan, M.A.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
In this paper, we studied the issues of integrability with the weight of the sum of series with respect
to multiplicative systems, provided that the coefficients of the series are monotonic. The conditions for
the weight ...
Toleugazy, Y.; Kervenev, K.Y.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
The embedding theory of spaces of differentiable functions of many variables studies important connections
and relationships between differential (smoothness) and metric properties of functions and has wide application
in ...
Suleimbekova, A.O.; Musilimov, B.M.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
As you know, the third order partial differential equation is one of the basic equations of wave theory.
For example, in particular, a linearized Korteweg-de Vries type equation with variable coefficients models
ion-acoustic ...
Mukharlyamov, R.G.; Kirgizbaev, Zh.K.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
Equations and methods of classical mechanics are used to describe the dynamics of technical systems
containing elements of various physical nature, planning and management tasks of production and economic
objects. The ...
Mirsaburov, M.; Berdyshev, A.S.; Ergasheva, S.B.; Makulbay, A.B.(Академик Е.А. Бөкетов атындағы Қарағанды университеті, 2024-06-30)
The work is devoted to the formulation and study of the solvability for a problem with missing conditions
on the characteristic boundary of the domain and an analogue of the Frankl condition on the segment
of the degeneracy ...