Journal of Osh State University. Mathematics. Physics. Technical Sciences

MATHEMATICS

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  Proving the correctness of the Collatz hypothesis

  Cherkasenko Anatoliy

  8-18

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

  Babaev Saifullo , Bekmamatov Zamirbek

  19-29

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

  Sopuev Adakhimzhan , Nuranov Baktybek

  30-40

  • pdf
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  The influence of small perturbation on phenomenon of delayed loss of sta-bility

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

  41-49

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

  Boborakhimova Makhbuba , Pardaeva Orzigul

  50-60

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

  Matisakov Tugolbay , Matisakov Zhumakadyr

  61-69

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

  Sultanov Sayit , Kenzhaev Idirisbek , Tursunbaev Zhanbolot , Ryskulov Ilyas

  70-80

  • pdf