Electronic catalog
Genre:Естественные науки (natural_sciences)
Search result:
19601-19610 of 22499
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
primitive recursive functions, punctually enumerable sets, Rogers semilattice, quick functions, punctual numberings
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
periodical press (Magazines)
BOUSSAHA A.
Boussaha, A. A modified Jacobi elliptic functions method for optical soliton solutions of a conformable nonlinear Schrödinger equation [Text] / A. Boussaha, B. Semmar , M. Al-Smadi [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 69-77. - Bibliogr.: p. 75-77 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this paper, precise and exact traveling wave solutions of the conformable differential nonlinear Schrödinger equation is studied
Keywords
non-linear Schrödinger equation, conformable fractional derivative, modified Jacobi elliptic functions method, extracting optical solitons-solutions, fractional derivative
Kazakhstan
0/0 Free
periodical press (Magazines)
ÖZMEN N.
Özmen, N. Advances in the generalized Cesaro polynomials [Text] / N. Özmen, E. Erkuş-Duman // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 159-169. - Bibliogr.: p. 169 ISSN 2518-7929.
UDC:
512.622
Subject headings
- Polynomials
Annotation
This paper aims to introduce a multivariable and multiparameter generalization of Cesaro polynomials
Keywords
Cesaro polynomials, generating function, recurrence relation, hypergeometric function, integral representation
Kazakhstan
0/0 Free
periodical press (Magazines)
NURAKHMETOV T. N.
Nurakhmetov, T. N. Formation of a combined electron-hole emission state in the LiRbSO4 – Eu phosphor [Text] / T. N. Nurakhmetov, R. Z. Bakhtizin , D. A. Tolekov [et al.] // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 3 (115). - P. 25-33. - Bibliogr.: p. 30-31 ISSN 2518-7198.
UDC:
535.3
Subject headings
- Emission
Annotation
In the irradiated phosphor 4LiRbSO Eu, the mechanisms of formation of the induced or combined electron-emitting state at 3.1-2.94 eV were studied using optical and thermal activation spectroscopy methods
Keywords
electron, hole, recombination emission, intrinsic emission, sulfate, excitation, рекомбинациялық сәулелендіру, рекомбинационное излучение
Kazakhstan
0/0 Free
periodical press (Magazines)
SEISENBAYEVA G. S.
Seisenbayeva, G. S. Enhanced charge separation at the interface of Cu2O/CuSCN composite thin films synthesized by electrodeposition technique [Text] / G. S. Seisenbayeva, D. S. Kambar , A. V. Zavgorodniy [et al.] // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 3 (115). - P. 34-40. - Bibliogr.: p. 39 ISSN 2518-7198.
UDC:
535
Subject headings
- Optics
Annotation
This study focuses on the synthesis and characterization of hole transport layers (HTLs) for solar cells, particularly copper(I) thiocyanate (CuSCN) and cuprous oxide (Cu2O), synthesized via electrodeposition techniques
Keywords
solar cells, hole transport layers, electrodeposition, copper(I) thiocyanate, cuprous oxide, optimal synthesis conditions, photoelectric response, chare transport, электр тұндыру, электроосаждение
Kazakhstan
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
BOUSSAHA A.
A MODIFIED JACOBI ELLIPTIC FUNCTIONS METHOD FOR OPTICAL SOLITON SOLUTIONS OF A CONFORMABLE NONLINEAR SCHRÖDINGER EQUATION
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
NURAKHMETOV T. N.
FORMATION OF A COMBINED ELECTRON-HOLE EMISSION STATE IN THE LIRBSO4 – EU PHOSPHOR
periodical press (Magazines)
0/0 Free
SEISENBAYEVA G. S.
ENHANCED CHARGE SEPARATION AT THE INTERFACE OF CU2O/CUSCN COMPOSITE THIN FILMS SYNTHESIZED BY ELECTRODEPOSITION TECHNIQUE
periodical press (Magazines)
0/0 Free