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Genre:Естественные науки (natural_sciences)
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71-80 of 104
periodical press (Magazines)
IMANBETOVA A. B.
Imanbetova, A. B. On solvability of the inverse problem for a fourth-order parabolicequation with a complex-valued coefficient [Text] / A. B. Imanbetova, A. A. Sarsenbi , B. Seilbekov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 1 (113). - P. 60-72. - Bibliogr.: p. 70-71 ISSN 2518-7929.
UDC:
517
Subject headings
- Analysis
Annotation
In this paper, the inverse problem for a fourth-order parabolic equation with a variable complex-valuedcoefficient is studied by the method of separation of variables
Keywords
parabolic equation, inverse problem, classical solution, Fourier method, strongly regular boundaryconditions, Riesz basis, параболалық теңдеу, Фурье әдiс, параболическое уравнение, метод Фурье
Kazakhstan
0/0 Free
periodical press (Magazines)
ARIPOV M. M.
Aripov, M. M. On the behaviors of solutions of a nonlinear diffusion system with a source and nonlinear boundary conditions [Text] / M. M. Aripov, Z. R. Rakhmonov , A. A. Alimov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 1 (113). - P. 28-45. - Bibliogr.: p. 43-44 ISSN 2518-7929.
UDC:
517.957
Subject headings
- Nonlinear equations and systems
Annotation
The article examines the global solvability and unsolvability of a nonlinear diffusion system with nonlinear boundaryconditions in the case of slow diffusion
Keywords
blow-up, nonlinear boundary condition, critical global existence curve, egenerate parabolicsystems, critical exponents of Fujita type, бейсызықты диффузиялық жүйе, нелинейное граничное условие, критические показатели типа Фуджиты, Фуджита типтi критикалық көрсеткiш
Kazakhstan
0/0 Free
periodical press (Magazines)
JENALIYEV M. T.
Jenaliyev, M. T. On the solvability of a boundary value problem for a two-dimensional system of Navier-Stokes equations in a cone [Text] / M. T. Jenaliyev, A. M. Serik , M. G. Yergaliyev // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 1 (113). - P. 84-100. - Bibliogr.: p. 96-98 ISSN 2518-7929.
UDC:
517
Subject headings
- Analysis
Annotation
In this work, we are exploring the solvability of a boundary value problem for a two-dimensional Navier-Stokes systemin a non-cylindrical degenerating domain, namely, in a cone with its vertex at the origin
Keywords
Navier-Stokes system, degenerating domain, Galerkin method, Навье-Стокс жүйесi, cистема Навье-Стокса
Kazakhstan
0/0 Free
periodical press (Magazines)
MAMAJONOV M.
Mamajonov, M. On the formulation and investigation of a boundary value problemfor a third-order equation of a parabolic-hyperbolic type [Text] / M. Mamajonov, Q. Rakhimov , Kh. Shermatova // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - Vol. 29, № 2 (114). - P. 135-146. - Bibliogr.: p. 142-143 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
In the paper a novel boundary value problem for a third-order partial differential equation (PDE) of aparabolic-hyperbolic type, within a pentagonal domain consisting of both parabolic and hyperbolic regionswas investigated
Keywords
differential equations, parabolic-hyperbolic type, a third-order parabolic-hyperbolic type, параболалық-гиперболалық тип, параболо-гиперболический тип
Kazakhstan
0/0 Free
periodical press (Magazines)
TURGUMBAEV M. ZH.
Turgumbaev, M. Zh. On conditions for the weighted integrability of the sum of the series with monotonic coefficients with respect to the multiplicative systems [Text] / M. Zh. Turgumbaev, Z. R. Suleimenova , M. A. Mukhambetzhan // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - Vol. 29, № 2 (114). - P. 197-210. - Bibliogr.: p. 207-208 ISSN 2518-7929.
UDC:
517
Subject headings
- Mathematical analysis
Annotation
In this paper the issues of integrability with the weight of the sum of series with respect to multiplicative systems were studied, provided that the coefficients of the series are monotonic
Keywords
the multiplicative systems, generator sequence, monotone coefficients, Hardy-Littlewood theorem, мультипликативтi жүйелер, Харди-Литтлвуд теоремасы, мультипликативные системы, теорема Харди-Литтлвуда
Kazakhstan
0/0 Free
periodical press (Magazines)
ULBRIKHT O. I.
Ulbrikht, O. I. On closure operators of Jonsson sets [Text] / O. I. Ulbrikht, G. A. Urken // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - Vol. 29, № 2 (114). - P. 211-220. - Bibliogr.: p. 217-218 ISSN 2518-7929.
UDC:
510.6
Subject headings
- Mathematical logic
Annotation
The work is related to the study of the model-theoretic properties of Jonsson theories, which, generallyspeaking, are not complete
Keywords
Jonsson theory, semantic model, Jonsson se, closure operator, J-pregeometry, йонсондық теория, тұйықталу операторы, йонсоновская теория, оператор замыкания
Kazakhstan
0/0 Free
periodical press (Magazines)
DZHAMALOV S. Z.
Dzhamalov, S. Z. On some linear two-point inverse problem for a multidimensionalheat conduction equation with semi-nonlocal boundary conditions [Text] / S. Z. Dzhamalov, Sh. Sh. Khudoykulov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - Vol. 29, № 2 (114). - P. 71-85. - Bibliogr.: p. 84-85 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
In this article, the authors studied the correctness of one linear two-point inverse problem for themultidimensional heat conduction equation
Keywords
multidimensional heat conduction equation, linear two-point inverse problem, methods of a priori estimates, Galerkin’s method, көп өлшемдi жылуөткiзгiштiк теңдеуi, многомерное уравнение теплопроводности
Kazakhstan
0/0 Free
periodical press (Magazines)
ZHAKATAYEV T. A.
Zhakatayev, T. A. On the possibility of changing the trajectory of a projectile or a rocket based on aerodynamic impact in the shock wave zone [Text] / T. A. Zhakatayev, G. K. Konysbekova // Л.Н. Гумилев атындағы Еуразия ұлттық университетінің хабаршысы. Техникалық ғылымдар және технологиялар сериясы. - 2024. - № 1 (146). - P. 21-33. - Bibliogr.: p. 31 ISSN 2616-7263.
UDC:
533.6.013
Subject headings
- Dynamics of aircraft
Annotation
A physical hypothesis is proposed that it is possible to change the design trajectory of the projectile on the basis of mechanical action on the entire volume of shockwave zones with a unilateral, asymmetric presence of the second projectile
Keywords
wavefront, projectile, rocket, aerodynamic resistance, trajectory, iteration, аэродинамика
Kazakhstan
0/0 Free
periodical press (Magazines)
ТҰРСЫН М. С.
Тұрсын , М. С. Odonata инеліктердің көбеюі [Мәтін] / М. С. Тұрсын , Р. Ж. Нургожин , А. Б. Калиева [ж. б.] // Семей қаласының Шәкәрім атындағы мемлекеттік университетінің хабаршысы. - 2016. - № 2 (74). - 168-169 б. - Библиогр.: 169 б. ISSN 1607-2774.
UDC:
595.7
Subject headings
- Insecta. Нехароdа. Жәндіктер. Энтомология
Annotation
Мақалада инеліктердің көбею туралы айтылған
Keywords
инелік , жәндіктер , тең қанаттылар , дернәсілдер
Kazakhstan
0/0 Free
periodical press (Magazines)
DYUSSEMBEKOVA D.
Dyussembekova, D. Optimization in vitro cultivation conditions for an endemic species of Regel's pear [Text] / D. Dyussembekova, I. Samatova , S. Bayanbay [et al.] // Қарағанды университетінің хабаршысы. Биология. Медицина. География сериясы. - 2024. - № 4 (116). - P. 35-43. - Bibliogr.: p. 41-42 ISSN 2518-7201.
UDC:
57.084.1
Subject headings
- Studying plants in laboratories
Annotation
The purpose of this study is to optimize the cultivation conditions of the endemic Regel pear species, which is resistant to scab, in vitro culture to preserve biodiversity and enhance sustainable development in Kazakhstan
Keywords
Pyrus regelii, invitro culture, endemic, micropropagation, Регель алмұрты, эндемик, груша Регеля
Kazakhstan
0/0 Free
IMANBETOVA A. B.
ON SOLVABILITY OF THE INVERSE PROBLEM FOR A FOURTH-ORDER PARABOLICEQUATION WITH A COMPLEX-VALUED COEFFICIENT
periodical press (Magazines)
0/0 Free
ARIPOV M. M.
ON THE BEHAVIORS OF SOLUTIONS OF A NONLINEAR DIFFUSION SYSTEM WITH A SOURCE AND NONLINEAR BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
JENALIYEV M. T.
ON THE SOLVABILITY OF A BOUNDARY VALUE PROBLEM FOR A TWO-DIMENSIONAL SYSTEM OF NAVIER-STOKES EQUATIONS IN A CONE
periodical press (Magazines)
0/0 Free
MAMAJONOV M.
ON THE FORMULATION AND INVESTIGATION OF A BOUNDARY VALUE PROBLEMFOR A THIRD-ORDER EQUATION OF A PARABOLIC-HYPERBOLIC TYPE
periodical press (Magazines)
0/0 Free
TURGUMBAEV M. ZH.
ON CONDITIONS FOR THE WEIGHTED INTEGRABILITY OF THE SUM OF THE SERIES WITH MONOTONIC COEFFICIENTS WITH RESPECT TO THE MULTIPLICATIVE SYSTEMS
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
DZHAMALOV S. Z.
ON SOME LINEAR TWO-POINT INVERSE PROBLEM FOR A MULTIDIMENSIONALHEAT CONDUCTION EQUATION WITH SEMI-NONLOCAL BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
ZHAKATAYEV T. A.
ON THE POSSIBILITY OF CHANGING THE TRAJECTORY OF A PROJECTILE OR A ROCKET BASED ON AERODYNAMIC IMPACT IN THE SHOCK WAVE ZONE
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
DYUSSEMBEKOVA D.
OPTIMIZATION IN VITRO CULTIVATION CONDITIONS FOR AN ENDEMIC SPECIES OF REGEL'S PEAR
periodical press (Magazines)
0/0 Free