## 2020

Archive

**Papers published in 2020**

**1.**

**Allen I. K., Duggal D., Nasir S., Karimov E. T.**On a boundary value problem for a time-fractional wave equation with the Riemann-Liouville and Atangana-Baleanu derivatives (1-9)

**3.**

**Babajanov B. A., Ruzmetov M. M., Babajanov A. B.**On the integration of a Toda-type chain with an integral type source (15-26)

**4.**

**Muydinjanov D. R.**Dirichlet problem for Helmholtz equation with the three singular coefficients (27-36)

**5.**

**Ruzimuradova D. H., Azamova N. A.**The analytic 3

*D*-system with the limit set consisting of four straight lines (37-40)

**6.**

**Abdushukurov F. A., Chuprunov A. N.**On the approximation of a Poisson random variable by a Gaussian random variable (41-49)

**8. K**

**adirkulov B. J., Jalilov M. A.**On a nonlocal problem for fourth-order mixed type equation with the Hilfer operator (59-67)

**10.**

**Mamanazarov A. O.**Tricomi problems for a parabolic-hyperbolic equation with singular coefficients (75-89)

**11.**

**Nurmuhamedova N. S.**Local asymptotic normality of statistical experiments in the competing risks model under combined hybrid random censoring (90-94)

**13.**Akhmadjon Urinov (dedicated to 70th Anniversary) (104-106)

**14.**

**Fayziev A. A., Turgunov T. T.**Statistical analysis and forecasting of cotton yield dynamics in the Republic of Uzbekistan (107-111)

**15.**

**Fayazova Z. K.**Boundary value problem for heat exchange process with Neumann condition in bound of region with integral condition (112-117)

**16.**

**Fayazov K. S., Xajiev I. O.**The boundary value problem for a second-order differential equation with one line of degeneracy (118-126)

**17.**

**Ergashev T.G., Safarbaeva N.M.**Holmgren problem for multidimensional Helmholtz equation with one singular coefficient (127-135)

**1.**

**Babadjanova A. K.**Integration of the matrix Ablowitz-Ladik lattice with a self-consistent source (1-10)

**2.**

**Prenov B. B.**Some examples of systems of non-algebraic equations (11-18)

**3.**

**Rozikov U. A., Shoyimardonov S. K.**A Model for COVID-19 Pandemic and Prediction for Uzbekistan (19-21)

**4.**

**Seytov Sh. J., Ganikhodzhayev R. N.**The method of graphical analysis for some two dimensional dynamical systems (22-26)

**5.**

**Abdurasulov K. K.**The isomorphism between algebras Inder

**6.**

**Boltayev A. K., Akhmedov D. M**. An extremal function of a quadrature formula (34-38)

**7.**

**Boltayev N. D.**Coefficients of the optimal quadrature formula for approximate calculation of Fourier integrals (39-46)

**8.**

**Islomov B. I., Ubaydullayev U. Sh.**On a boundary value problem with boundary conditions of the second kind for an equation of parabolic - hyperbolic type with a fractional order operator in the sense of Caputo in a rectangular domain (47-57)

**9.**

**Ismoilov A. S.**Uniqueness and existence of a solution to the problem of integral geometry in a strip (58-67)

**10.**

**Karimov K. T.**Dirichlet type problem for a three-dimensional equation of mixed type with three singular coefficients in a semi-infinite parallelepiped (68-82)

**11.**

**Kakadjonava L. R.**Uniform theorems of the Glivenko-Cantelli and Donsker type for a sequential integral process of independence (83-91)

**12.**

**Muxamedov A. K., Kobilov U. X.**Asymptotic normality of two sample Wilcoxson-Mann-Whitney statistics of strongly positive orthant dependent sequences (92-96)

**13.**

**Safarov J. Sh.**The problem of determining the kernel of an integro-differential equations with smooth data in a bounded domain (97-102)

**14.**

**Usmonov B. Z.**The non-local problem for an equation with the third-order elliptic-hyperbolic operator (103-110)