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Жанр:Естественные науки (natural_sciences)
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4151-4160 из 4428
периодические издания(Журналы)
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.
УДК:
512
Предметная рубрика
- Algebra
Аннотация
In the present paper sets related to invariant Riemannian metrics of positive sectional and (or) Ricci curvature on generalized Wallach spaces are considered
Ключевые слова
generalized Wallach space, Riemannian metric, Kähler metric, normalized Ricci flow, sectional curvature, Ricci curvature, dynamical system, singular point
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
51
Предметная рубрика
- Mathematics
Аннотация
This work investigates the structure of punctual numberings for families of punctually enumerable sets with respect to primitive recursively reducibility
Ключевые слова
Rogers semilattice, quick functions, punctual numberings, primitive recursive functions, punctually enumerable sets
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
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
Ключевые слова
fractional differential equations, tempered Ψ−Caputo derivative, nonlinear analysis, Schaefer’s fixed point theorem, Banach contraction
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
Local and nonlocal boundary value problems (LNBVPs) related to fourth-order differential equations (FODEs) were explored
Ключевые слова
Taylor’s decomposition on five points (TDFP), LNBVPs, DSs, approximation, numerical experiment
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations. Integral equations
Аннотация
Singularly perturbed integro-differential equations with degenerate kernels are considered
Ключевые слова
singularly perturbed, Hammerstein’s equation, degenerate kernel, Fredholm’s equations, analytic function, Laurent’s series, passage to the limit, the Maple program
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
In this paper, precise and exact traveling wave solutions of the conformable differential nonlinear Schrödinger equation is studied
Ключевые слова
non-linear Schrödinger equation, conformable fractional derivative, modified Jacobi elliptic functions method, extracting optical solitons-solutions, fractional derivative
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
512.622
Предметная рубрика
- Polynomials
Аннотация
This paper aims to introduce a multivariable and multiparameter generalization of Cesaro polynomials
Ключевые слова
Cesaro polynomials, generating function, recurrence relation, hypergeometric function, integral representation
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
535.3
Предметная рубрика
- Emission
Аннотация
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
Ключевые слова
electron, hole, recombination emission, intrinsic emission, sulfate, excitation, рекомбинациялық сәулелендіру, рекомбинационное излучение
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
535
Предметная рубрика
- Optics
Аннотация
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
Ключевые слова
solar cells, hole transport layers, electrodeposition, copper(I) thiocyanate, cuprous oxide, optimal synthesis conditions, photoelectric response, chare transport, электр тұндыру, электроосаждение
Казахстаника
0/0 Свободно
периодические издания(Журналы)
SALIM S. H.
Salim, S. H. Solving Volterra-Fredholm integral equations by non-polynomial spline functions [Text] / S. H. Salim, K. H. F. Jwamer , R. K. Saeed // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 170-184. - Bibliogr.: p. 183-184 ISSN 2518-7929.
УДК:
517.9
Предметная рубрика
- Differential equations. Integral equations
Аннотация
In this paper a novel non-polynomial spline function to obtain the numerical solution of equation (1) for the first time
Ключевые слова
Volterra integral equation, Fredholm integral equation, non-polynomial spline function, integral equations, linear equations
Казахстаника
0/0 Свободно
ABIEV N. A.
STRUCTURAL PROPERTIES OF THE SETS OF POSITIVELY CURVED RIEMANNIAN METRICS ON GENERALIZED WALLACH SPACES
периодические издания(Журналы)
0/0 Свободно
периодические издания(Журналы)
0/0 Свободно
BENSASSA K.
ON SOLUTION OF NON-LINEAR FDE UNDER TEMPERED Ψ−CAPUTO DERIVATIVE FOR THE FIRST-ORDER AND THREE-POINT BOUNDARY CONDITIONS
периодические издания(Журналы)
0/0 Свободно
ASHYRALYEV A.
THE COMPACT EIGHTH-ORDER OF APPROXIMATION DIFFERENCE SCHEMES FOR FOURTH-ORDER DIFFERENTIAL EQUATION
периодические издания(Журналы)
0/0 Свободно
BOBODZHANOVA M. A.
SINGULARLY PERTURBED INTEGRO-DIFFERENTIAL EQUATIONS WITH DEGENERATE HAMMERSTEIN’S KERNEL
периодические издания(Журналы)
0/0 Свободно
BOUSSAHA A.
A MODIFIED JACOBI ELLIPTIC FUNCTIONS METHOD FOR OPTICAL SOLITON SOLUTIONS OF A CONFORMABLE NONLINEAR SCHRÖDINGER EQUATION
периодические издания(Журналы)
0/0 Свободно
периодические издания(Журналы)
0/0 Свободно
NURAKHMETOV T. N.
FORMATION OF A COMBINED ELECTRON-HOLE EMISSION STATE IN THE LIRBSO4 – EU PHOSPHOR
периодические издания(Журналы)
0/0 Свободно
SEISENBAYEVA G. S.
ENHANCED CHARGE SEPARATION AT THE INTERFACE OF CU2O/CUSCN COMPOSITE THIN FILMS SYNTHESIZED BY ELECTRODEPOSITION TECHNIQUE
периодические издания(Журналы)
0/0 Свободно
SALIM S. H.
SOLVING VOLTERRA-FREDHOLM INTEGRAL EQUATIONS BY NON-POLYNOMIAL SPLINE FUNCTIONS
периодические издания(Журналы)
0/0 Свободно