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
Submit an article

Issue

Vol. 4, No. 1, 2025

  • 02.07.2025

Journal of Osh State University. Mathematics. Physics. Technics

e-ISSN 1694-8645 (Online)

Publisher: Osh State University

Download issue

All articles from the issue

open access

Proving the correctness of the Collatz hypothesis

Keywords: natural numbers; odd number potential; mathematical induction; sequence analysis; open problem

Anatoliy Cherkasenko

https://doi.org/10.52754/16948645_2025_4(1)_8

Suggested citation

APA
Cherkasenko, A. (2025). Proving the correctness of the Collatz hypothesis. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 8-18. https://doi.org/10.52754/16948645_2025_4(1)_8
Vancouver
Cherkasenko A. Proving the correctness of the Collatz hypothesis. J Osh State Univ Math Phys Tech Sci. 2025;4(1):8–18. doi:10.52754/16948645_2025_4(1)_8
Read more
  • 19.06.2025
  • 1,531 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

The matching problem for fourth-order composite and hyperbolic equations with two lines of change of type

Keywords: boundary value problems; Dirichlet problem; Darboux-type problem; Green’s function; matching conditions; boundary conditions; Volterra and Fredholm equations

Sayfullo Babaev, Zamirbek Bekmamatov

https://doi.org/10.52754/16948645_2025_4(1)_19

Suggested citation

APA
Babaev, S., & Bekmamatov, Z. (2025). The matching problem for fourth-order composite and hyperbolic equations with two lines of change of type. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 19-29. https://doi.org/10.52754/16948645_2025_4(1)_19
Vancouver
Babaev S, Bekmamatov Z. The matching problem for fourth-order composite and hyperbolic equations with two lines of change of type. J Osh State Univ Math Phys Tech Sci. 2025;4(1):19–29. doi:10.52754/16948645_2025_4(1)_19
Read more
  • 19.06.2025
  • 525 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

Boundary value problems for a mixed type equation of the 3rd order with variable coefficients

Keywords: existence; uniqueness; Green's function; Riemann's function; integral equation; order reduction method

Adakhimzhan Sopuev, Baktybek Nuranov

https://doi.org/10.52754/16948645_2025_4(1)_30

Suggested citation

APA
Sopuev, A., & Nuranov, B. (2025). Boundary value problems for a mixed type equation of the 3rd order with variable coefficients. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 30-40. https://doi.org/10.52754/16948645_2025_4(1)_30
Vancouver
Sopuev A, Nuranov B. Boundary value problems for a mixed type equation of the 3rd order with variable coefficients. J Osh State Univ Math Phys Tech Sci. 2025;4(1):30–40. doi:10.52754/16948645_2025_4(1)_30
Read more
  • 19.06.2025
  • 625 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

The influence of small perturbation on phenomenon of delayed loss of stability

Keywords: small parameter; limit transition; eigenvalues; stability of solutions; integral curves

Abdilaziz Akmatov, Kylymgul Mamadjanova, Arafatkan Baimamatova, Eliza Islamidin kyzy

https://doi.org/10.52754/16948645_2025_4(1)_41

Suggested citation

APA
Akmatov, A., Mamadjanova, K., Baimamatova, A., & Islamidin kyzy, E. (2025). The influence of small perturbation on phenomenon of delayed loss of stability. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 41-49. https://doi.org/10.52754/16948645_2025_4(1)_41
Vancouver
Akmatov A, Mamadjanova K, Baimamatova A, Islamidin kyzy E. The influence of small perturbation on phenomenon of delayed loss of stability. J Osh State Univ Math Phys Tech Sci. 2025;4(1):41–9. doi:10.52754/16948645_2025_4(1)_41
Read more
  • 19.06.2025
  • 707 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

A nonlinear free-boundary model with variable diffusion and advection coefficients for pollutant-population dynamics in rivers

Keywords: nonlinear dynamics; pollutant spread; free-boundary problem; numerical simulations; diffusion coefficient

Makhbuba Boborakhimova, Orzigul Pardaeva

https://doi.org/10.52754/16948645_2025_4(1)_50

Suggested citation

APA
Boborakhimova, M., & Pardaeva, O. (2025). A nonlinear free-boundary model with variable diffusion and advection coefficients for pollutant-population dynamics in rivers. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 50-60. https://doi.org/10.52754/16948645_2025_4(1)_50
Vancouver
Boborakhimova M, Pardaeva O. A nonlinear free-boundary model with variable diffusion and advection coefficients for pollutant-population dynamics in rivers. J Osh State Univ Math Phys Tech Sci. 2025;4(1):50–60. doi:10.52754/16948645_2025_4(1)_50
Read more
  • 19.06.2025
  • 565 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

Analysis and research of solar heating in the design of residential buildings

Keywords: renewable energy sources; thermal efficiency; architectural solutions; thermal insulation of buildings; climatic characteristics; optimisation of building elements; seasonal adaptation of structures

Tugolbay Matisakov, Zhumakadyr Matisakov

https://doi.org/10.52754/16948645_2025_4(1)_61

Suggested citation

APA
Matisakov, T., & Matisakov, Zh. (2025). Analysis and research of solar heating in the design of residential buildings. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 61-69. https://doi.org/10.52754/16948645_2025_4(1)_61
Vancouver
Matisakov T, Matisakov Zh. Analysis and research of solar heating in the design of residential buildings. J Osh State Univ Math Phys Tech Sci. 2025;4(1):61–9. doi:10.52754/16948645_2025_4(1)_61
Read more
  • 19.06.2025
  • 534 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025
open access

Design of heat losses calculation method in elements of double-circuit solar water heating collectors

Keywords: solar radiation; heat transfer coefficient; heat exchange; heat balance; heat-absorbing surface; convection; radiation

Sayit Sultanov, Idirisbek Kenzhaev, Zhanbolot Tursunbaev, Ilyas Ryskulov

https://doi.org/10.52754/16948645_2025_4(1)_70

Suggested citation

APA
Sultanov, S., Kenzhaev, I., Tursunbaev, Zh., & Ryskulov, I. (2025). Design of heat losses calculation method in elements of double-circuit solar water heating collectors. Journal of Osh State University. Mathematics. Physics. Technical Sciences, 4(1), 70-80. https://doi.org/10.52754/16948645_2025_4(1)_70
Vancouver
Sultanov S, Kenzhaev I, Tursunbaev Zh, Ryskulov I. Design of heat losses calculation method in elements of double-circuit solar water heating collectors. J Osh State Univ Math Phys Tech Sci. 2025;4(1):70–80. doi:10.52754/16948645_2025_4(1)_70
Read more
  • 19.06.2025
  • 665 Views
  • Journal of Osh State University. Mathematics. Physics. Technical Sciences - Vol. 4, No. 1, 2025