Journal of Osh State University. Mathematics. Physics. Technical Sciences
Journal of Osh State University. Mathematics. Physics. Technical Sciences
e-ISSN 1694-8645
DOI: 10.52754/16948645
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Vol. 1, No. 1, 2022

  • 20.12.2022

Journal of Osh State University. Mathematics. Physics. Technics

e-ISSN 1694-8645 (Online)

Publisher: Osh State University

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Some features of the solution of a nonlinear singularly perturbed problem

Keywords: singular perturbations; small parameter; asymptotic; stability; solutions; initial; conditions; expansions

Abdilaziz Akmatov

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APA
Akmatov, A. (2022). Some features of the solution of a nonlinear singularly perturbed problem. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 4-8.
Vancouver
Akmatov A. Some features of the solution of a nonlinear singularly perturbed problem. J Osh State Univ Math Phys Tech Sci. 2022;1(1):4–8.
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  • 25.11.2022
  • 461 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Construction of the asymptotics of a singularly perturbed first-order differential equation with a singular point

Keywords: singularly perturbed; weakly indignant; turning point

Gulasal Dadazhanova, Aidana Absatar kyzy

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APA
Dadazhanova, G., & Absatar kyzy, A. (2022). Construction of the asymptotics of a singularly perturbed first-order differential equation with a singular point. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 9-15.
Vancouver
Dadazhanova G, Absatar kyzy A. Construction of the asymptotics of a singularly perturbed first-order differential equation with a singular point. J Osh State Univ Math Phys Tech Sci. 2022;1(1):9–15.
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  • 25.11.2022
  • 520 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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On the boundary problem for a mixed parabolic-hyperbolic equation of the third order

Keywords: boundary value problems; conjugation line; gluing conditions; mixed parabolic-hyperbolic operator; Riemann methods and integral equations

Adakhimzhan Sopuev, Baktybek Nuranov

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APA
Sopuev, A., & Nuranov, B. (2022). On the boundary problem for a mixed parabolic-hyperbolic equation of the third order. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 16-22.
Vancouver
Sopuev A, Nuranov B. On the boundary problem for a mixed parabolic-hyperbolic equation of the third order. J Osh State Univ Math Phys Tech Sci. 2022;1(1):16–22.
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  • 25.11.2022
  • 634 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Of singularly perturbed problems of the optimal management

Keywords: singular perturbations; optimal control; boundary layer; external and internal solutions; method of composite expansions; maximum principle

Aybek Toktorbaev

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APA
Toktorbaev, A. (2022). Of singularly perturbed problems of the optimal management. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 23-29.
Vancouver
Toktorbaev A. Of singularly perturbed problems of the optimal management. J Osh State Univ Math Phys Tech Sci. 2022;1(1):23–9.
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  • 25.11.2022
  • 451 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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On the Cauchy problem for degenerate equations of a reacting gas mixture

Keywords: velocity; density; temperature; magnetic field; electric field; generalized solution; a priori estimates; existence; systems of equations

Aybek Toktorbaev, Dolonbek Pakal uulu

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APA
Toktorbaev, A., & Pakal uulu, D. (2022). On the Cauchy problem for degenerate equations of a reacting gas mixture. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 30-42.
Vancouver
Toktorbaev A, Pakal uulu D. On the Cauchy problem for degenerate equations of a reacting gas mixture. J Osh State Univ Math Phys Tech Sci. 2022;1(1):30–42.
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  • 25.11.2022
  • 454 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Asymptotics of the solution of the Cauchy problem for a system of differential equations with a turning point

Keywords: unstable spectrum; V. Vazov's system of equations; turning point; singularly perturbed Cauchy problem; small parameter; boundary functions

Dilmurat Tursunov, Altynbek Zulpukarov, Akbermet Sadieva

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APA
Tursunov, D., Zulpukarov, A., & Sadieva, A. (2022). Asymptotics of the solution of the Cauchy problem for a system of differential equations with a turning point. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 43-50.
Vancouver
Tursunov D, Zulpukarov A, Sadieva A. Asymptotics of the solution of the Cauchy problem for a system of differential equations with a turning point. J Osh State Univ Math Phys Tech Sci. 2022;1(1):43–50.
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  • 25.11.2022
  • 526 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Approximate-asymptotic solution of a singularly perturbated first boundary value problem for a ring

Keywords: singular perturbation; first boundary value problem; elliptic type equation; Vishik-Lyusternik method; Laplacian; potential

Anvar Khalmatov, Turgunoy Kamilova, Turgunoy Kamilova

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APA
Khalmatov, A., Kamilova, T., & Kamilova, N. (2022). Approximate-asymptotic solution of a singularly perturbated first boundary value problem for a ring. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 51-57.
Vancouver
Khalmatov A, Kamilova T, Kamilova N. Approximate-asymptotic solution of a singularly perturbated first boundary value problem for a ring. J Osh State Univ Math Phys Tech Sci. 2022;1(1):51–7.
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  • 25.11.2022
  • 432 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Inverse problem of findining the right-hand side of the partial differential equation in fourth-order

Keywords: Singularly perturbed; weakly indignant; turning point

Anvar Khalmatov, Zilola Kalandarova, Gulnur Kanybek kyzy

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APA
Khalmatov, A., Kalandarova, Z., & Kanybek kyzy, G. (2022). Inverse problem of findining the right-hand side of the partial differential equation in fourth-order. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 58-66.
Vancouver
Khalmatov A, Kalandarova Z, Kanybek kyzy G. Inverse problem of findining the right-hand side of the partial differential equation in fourth-order. J Osh State Univ Math Phys Tech Sci. 2022;1(1):58–66.
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  • 25.11.2022
  • 496 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Simulation of natural convection in a rectangular cavity taking into account radiation heat transfer in the OpenFOAM package

Keywords: Three-dimensional model of a room; Natural convection; Navier-Stokes; buoyancy; radiation; buoyantSimpleFoam; OpenFOAM

Mahburat Kalbekova, Abdikerim Kurbanaliev

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APA
Kalbekova, M., & Kurbanaliev, A. (2022). Simulation of natural convection in a rectangular cavity taking into account radiation heat transfer in the OpenFOAM package. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 67-80.
Vancouver
Kalbekova M, Kurbanaliev A. Simulation of natural convection in a rectangular cavity taking into account radiation heat transfer in the OpenFOAM package. J Osh State Univ Math Phys Tech Sci. 2022;1(1):67–80.
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  • 25.11.2022
  • 539 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Chemical composition of basalt rocks of the Kyzyl-Kiy deposit of the Kyrgyz Republic

Keywords: Crystals of basalt rocks; rock wool; fiber; color scheme; basalt fiber; oxides of chemical elements; silicate and alumina modules; chemical valuable components

Yslamidin Tashpolotov, Elbek Mamatov

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APA
Tashpolotov, Y., & Mamatov, E. (2022). Chemical composition of basalt rocks of the Kyzyl-Kiy deposit of the Kyrgyz Republic. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 81-91.
Vancouver
Tashpolotov Y, Mamatov E. Chemical composition of basalt rocks of the Kyzyl-Kiy deposit of the Kyrgyz Republic. J Osh State Univ Math Phys Tech Sci. 2022;1(1):81–91.
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  • 25.11.2022
  • 476 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022
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Modeling of the flow over the Sulaiman mountain in the frame of the OpenFOAM package

Keywords: Wind flow modeling; Navier-Stokes; hillside; Sulaiman mountain; OpenFOAM

Akpari Turganbaeva, Abdikerim Kurbanaliev

Suggested citation

APA
Turganbaeva, A., & Kurbanaliev, A. (2022). Modeling of the flow over the Sulaiman mountain in the frame of the OpenFOAM package. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 1(1), 92-101.
Vancouver
Turganbaeva A, Kurbanaliev A. Modeling of the flow over the Sulaiman mountain in the frame of the OpenFOAM package. J Osh State Univ Math Phys Tech Sci. 2022;1(1):92–101.
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  • 25.11.2022
  • 434 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 1, No. 1, 2022