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2018
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3(91)/2018-Математика
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Browsing 3(91)/2018-Математика by Issue Date

Browsing 3(91)/2018-Математика by Issue Date

Now showing items 1-14 of 14

On one problem for restoring the density of sources of the fractional heat conductivity process with respect to initial and final temperatures

Erdogan, A.S.; Kusmangazinova, D.; Orazov, I.; Sadybekov, M.A. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In this paper we consider inverse problems for a fractional heat equation, where the fractional time derivative is taken into account in Riemann-Liouville sense. For the solution of this equation, we have to find an unknown ...
New singular solutions for the (3+1)-D Protter problem

Popov, T.P. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

For the nonhomogeneous wave equation with three space and one time variables we study a boundary value problem that can be regarded as a four-dimensional analogue of the Darboux problem in R2. Unlike the planar Darboux ...
A criterion for the existence of soliton solutions of telegraph equation

Kal’menov, T.Sh.; Arepova, G.D. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In this paper we consider a telegraph equation. In the case of a rectangular domain for the Cauchy potential the lateral boundary conditions obtained. When considering the equation in the first quadrant a criterion for the ...
Nonlocal spectral problem for a second-order di˙erential equation with an involution

Kritskov, L.V.; Sadybekov, M.A; Sarsenbi, A.M. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

For the spectral problem -u"(x) + au"(—x) = \u(x), —1 < x < 1, with nonlocal boundary conditions u(—1) = /3u( 1), u'(—1) = u'(1), where a € (—1,1), в2 = 1, we study the spectral properties. We show that If r = ^/(1 — a)/(1 ...
Dynamics of HIV-1 infected population acquired via di˙erent sexual contacts route: a case study of Turkey

Hincal, E.; Sayan, M.; Baba, I.A.; Sanlidag, T.; Saad, F.T.; Kaymakamzade, B. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

This paper aims to study the transmission dynamics of HIV/AIDS in heterosexual, men having sex with men (MSM)/bisexuals and others in Turkey. Four equilibrium points were obtained which include disease free and endemic ...
Identification hyperbolic problems with the Neumann boundary condition

Ashyralyev, A.; Emharab, F. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In the present study, an identification problem with the Neumann boundary condition for a one-dimensional hyperbolic equation is investigated. Stability estimates for the solution of the identification problem are established. ...
Numerical solution of the nonlocal boundary value problem for elliptic equations

Ashyralyev, A.; Hamad, A. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In the present paper a second order of accuracy two-step difference scheme for an approximate solution of the nonlocal boundary value problem for the elliptic differential equation — v//(t) + Av(t) = f (t) T (0 < t < T), ...
On the numerical solution of identification hyperbolic-parabolic problems with the Neumann boundary condition

Ashyralyeva, M.A.; Ashyralyev, M. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In the present study, a numerical study for source identification problems with the Neumann boundary condition for a one-dimensional hyperbolic-parabolic equation is presented. A first order of accuracy difference scheme ...
Inverse source problems for a wave equation with involution

Tapdigoglu, R.; Torebek, B.T. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

A class of inverse problems for a wave equation with involution is considered for cases of two di˙erent boundary conditions, namely, Dirichlet and Neumann boundary conditions. The existence and uniqueness of solutions of ...
On the solvability of the boundary value problems for the elliptic quation of high order on a plane

Koshanov, B.D.; Soldatov, A.P. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

For the elliptic equation of 21—th order with of constant (and only) real coefficients we consider boundary value problem of the normal derivatives (kj — 1) order, j = 1,... ,1, where 1 < k1 < ... < ki < 21 — 1. When kj = ...
On some approximate calculations for certain pseudo-di˙erential equations

Vasilyev, V.B. (Ye.A.Buketov Karaganda State University Publishing house, 2018-09-29)

We consider discrete pseudo-di˙erential operatots and equations as approximate operators and equations for their continuous analogues. For this purpose we study a solvability for such equations in appropriate discrete ...
Some approximations of second order derivatives complex-valued functions

Ashyralyev, Ch.; Ozturk, B. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In this paper, we generate the well known finite difference method to compute derivatives of real valued function to approximate of second order complex derivatives wzz and w-zz for complex-valued function w. Exploring ...
A note on the second order of accuracy di˙erence scheme for elliptic-parabolic equations in H¨older spaces

Ashyralyev, A.; Gercek, O.; Zusi, E. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

The present paper is devoted to the study of a second order of accuracy di˙erence scheme for a solution of the elliptic-parabolic equation with nonlocal boundary condition. The well-posedness of the second order of accuracy ...
Unconditional basicity of eigenfunctions’ system of Sturm-Liouville operator with an involutional perturbation

Sarsenbi, A.A. (Ye.A.Buketov Karaganda State University Publ., 2018-09-29)

In this paper the question on unconditional basicity of the system of eigenfunctions of the involutive perturbed Sturm-Liouville operator is investigated. The Green’s function of the operator under consideration in the ...

Browsing 3(91)/2018-Математика by Issue Date

Browsing 3(91)/2018-Математика by Issue Date

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