Electronic catalog
Genre:Естественные науки (natural_sciences)
Search result:
19611-19620 of 22530
periodical press (Magazines)
KENZHINA К. D.
Kenzhina, К. D. Features of the distribution of vegetation cover depending on the physical and geographical location of the northern part of the Kazakh Uplands [Text] / К. D. Kenzhina, A. D. Rustemova , K. A. Tuleshova [et al.] // Қарағанды университетінің хабаршысы. Биология. Медицина. География сериясы. - 2024. - № 4 (116). - P. 205-211. - Bibliogr.: p. 210 ISSN 2518-7201.
UDC:
581.9
Subject headings
- Geographic botany
Annotation
In the article the peculiarity of the distribution of vegetation cover, due to the natural landscape specifics of the lands of Kazakhstan was noted. In this regard, the object under study - the northern part of Saryarka
Keywords
soil, растительный покров, melkosopochnik, vegetation cover, landscape, climate, plants, өсімдік жамылғысы
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHYRALYYEV C.
Ashyralyyev, C. Numerical solution of source identification multi-point problem of parabolic partial differential equation with Neumann type boundary condition [Text] / C. Ashyralyyev, T. A. Ashyralyyeva // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 66-76. - Bibliogr.: p. 74-76 ISSN 2518-7929.
UDC:
517.956.4
Subject headings
- Parabolic equations and systems
Annotation
Stability estimates for the solution of the overdetermined mixed BVP for multidimensional parabolic equation were established. The first and second order of accuracy difference schemes for the approximate solution of this problem were proposed
Keywords
parabolic equation, difference scheme, nonlocal condition, boundary value problem, well-posedness, stability estimates, mixed problem, inverse problem
Kazakhstan
0/0 Free
periodical press (Magazines)
ARIPOV M. M.
Aripov, M. M. On stability of nonlinear difference equations and some of their applications [Text] / M. M. Aripov, D. Utebaev , B. D. Utebaev [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 13-25. - Bibliogr.: p. 23-25 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
The issues of stability in solving nonlinear difference equations were considered
Keywords
a priori estimates, stability, difference schemes, nonlinear difference equations, difference equations
Kazakhstan
0/0 Free
periodical press (Magazines)
TASKIN A.
Taskin, A. Source identification problems for the neutron transport equations [Text] / A. Taskin // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 137-149. - Bibliogr.: p. 147-149 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this study, the time-dependent source identification problem for the two-dimensional neutron transport equation was studied
Keywords
identification problem, neutron transport equation, difference scheme, differential equation, stability inequality
Kazakhstan
0/0 Free
periodical press (Magazines)
VALIYEV A. A.
Valiyev, A. A. Spectrum and resolvent of multi-channel systems with internal energies and common boundary conditions [Text] / A. A. Valiyev, M. B. Valiyev , E. H. Huseynov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2025. - № 3 (115). - P. 150-157. - Bibliogr.: p. 157 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In the article the spectrum and resolvent of the so-called multichannel systems with nonzero internal energies were investigated
Keywords
eigenvalues, edge problem, Wronskian, transformation operator, asymptotics, continuous spectrum, resolvent, multi-channel systems, internal energy, quantum physics
Kazakhstan
0/0 Free
periodical press (Magazines)
ABIEV N. A.
Abiev, N. A. Structural properties of the sets of positively curved Riemannian metrics on generalized Wallach spaces [Text] / N. A. Abiev // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 4-17. - Bibliogr.: p. 16-17 ISSN 2518-7929.
UDC:
512
Subject headings
- Algebra
Annotation
In the present paper sets related to invariant Riemannian metrics of positive sectional and (or) Ricci curvature on generalized Wallach spaces are considered
Keywords
generalized Wallach space, Riemannian metric, Kähler metric, normalized Ricci flow, sectional curvature, Ricci curvature, dynamical system, singular point
Kazakhstan
0/0 Free
periodical press (Magazines)
ASKARBEKKYZY A.
Askarbekkyzy, A. Punctual numberings for families of sets [Text] / A. Askarbekkyzy Bagaviev , V. Isakov [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 31-40. - Bibliogr.: p. 38-40 ISSN 2518-7929.
UDC:
51
Subject headings
- Mathematics
Annotation
This work investigates the structure of punctual numberings for families of punctually enumerable sets with respect to primitive recursively reducibility
Keywords
Rogers semilattice, quick functions, punctual numberings, primitive recursive functions, punctually enumerable sets
Kazakhstan
0/0 Free
periodical press (Magazines)
BENSASSA K.
Bensassa, K. On solution of non-linear FDE under tempered Ψ−Caputo derivative for the first-order and three-point boundary conditions [Text] / K. Bensassa, M. Benbachir , M. E. Samei [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 41-56. - Bibliogr.: p. 54-56 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this article, the existence and uniqueness of solutions for non-linear fractional differential equation with Tempered Ψ−Caputo derivative with three-point boundary conditions were studied
Keywords
fractional differential equations, tempered Ψ−Caputo derivative, nonlinear analysis, Schaefer’s fixed point theorem, Banach contraction
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHYRALYEV A.
Ashyralyev, A. The compact eighth-order of approximation difference schemes for fourth-order differential equation [Text] / A. Ashyralyev, I. M. Ibrahim // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 18-30. - Bibliogr.: p. 29-30 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
Local and nonlocal boundary value problems (LNBVPs) related to fourth-order differential equations (FODEs) were explored
Keywords
Taylor’s decomposition on five points (TDFP), LNBVPs, DSs, approximation, numerical experiment
Kazakhstan
0/0 Free
periodical press (Magazines)
BOBODZHANOVA M. A.
Bobodzhanova, M. A. Singularly perturbed integro-differential equations with degenerate Hammerstein’s kernel [Text] / M. A. Bobodzhanova, B. T. Kalimbetov , V. F. Safonov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 57-68. - Bibliogr.: p. 66-68 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
Singularly perturbed integro-differential equations with degenerate kernels are considered
Keywords
singularly perturbed, Hammerstein’s equation, degenerate kernel, Fredholm’s equations, analytic function, Laurent’s series, passage to the limit, the Maple program
Kazakhstan
0/0 Free
KENZHINA К. D.
FEATURES OF THE DISTRIBUTION OF VEGETATION COVER DEPENDING ON THE PHYSICAL AND GEOGRAPHICAL LOCATION OF THE NORTHERN PART OF THE KAZAKH UPLANDS
periodical press (Magazines)
0/0 Free
ASHYRALYYEV C.
NUMERICAL SOLUTION OF SOURCE IDENTIFICATION MULTI-POINT PROBLEM OF PARABOLIC PARTIAL DIFFERENTIAL EQUATION WITH NEUMANN TYPE BOUNDARY CONDITION
periodical press (Magazines)
0/0 Free
ARIPOV M. M.
ON STABILITY OF NONLINEAR DIFFERENCE EQUATIONS AND SOME OF THEIR APPLICATIONS
periodical press (Magazines)
0/0 Free
TASKIN A.
SOURCE IDENTIFICATION PROBLEMS FOR THE NEUTRON TRANSPORT EQUATIONS
periodical press (Magazines)
0/0 Free
VALIYEV A. A.
SPECTRUM AND RESOLVENT OF MULTI-CHANNEL SYSTEMS WITH INTERNAL ENERGIES AND COMMON BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
ABIEV N. A.
STRUCTURAL PROPERTIES OF THE SETS OF POSITIVELY CURVED RIEMANNIAN METRICS ON GENERALIZED WALLACH SPACES
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
BENSASSA K.
ON SOLUTION OF NON-LINEAR FDE UNDER TEMPERED Ψ−CAPUTO DERIVATIVE FOR THE FIRST-ORDER AND THREE-POINT BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
ASHYRALYEV A.
THE COMPACT EIGHTH-ORDER OF APPROXIMATION DIFFERENCE SCHEMES FOR FOURTH-ORDER DIFFERENTIAL EQUATION
periodical press (Magazines)
0/0 Free
BOBODZHANOVA M. A.
SINGULARLY PERTURBED INTEGRO-DIFFERENTIAL EQUATIONS WITH DEGENERATE HAMMERSTEIN’S KERNEL
periodical press (Magazines)
0/0 Free