## 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)

1.

**Aralova K. A., Jamilov U. U.**On the dynamics of superposition of non-Volterra quadratic stochastic operators (1-14)2.

**Durdiev D. K., Nuriddinov Zh. Z.**Kernel determining problem in the integro–differential heat equation with a variable thermal conductivity (15-26)3.

**Eshkabilov Yu. Kh., Nodirov Sh. D.**On the positive fixed points of quartic operators (27-36)4.

**Imomkulov A. N.**On absolute nilpotent elements of the evolution algebras corresponding to approximation of finite dimensional algebras (37-41)5.

**Ishmetov A. Ya.**On*C*-properties of the space of idempotent probability measures (42-48)6.

**Mamatov M. Sh., Nuritdinov J. T.**On some laws for calculating the Мinkovski difference and sum (49-59)7.

**Mustapokulov Kh. Y.**On a certain invariance problem for a constant multivalued mapping in a heat conduction problem with impulse control (60-67)8.

**Rahmonov E. S., Beshimov G. R.**Complete system of invariants of m-points in the two-dimensional bilinear-metric space with the form $x_1y_1-2x_2y_2$ over the field of rational numbers (68-76)9.

**Mohd Danish Siddiqi.**Generalized Yamabe solitons on Trans Sasakian manifolds (77-85)10.

**Sheraliyev Sh. N.**On the solvability of the quasi-linear periodic problem of peridynamics (86-93)11.

**Umrzaqov N. M.**Local derivations of nilpotent algebras of upper triangular matrices (94-97)12.

**Usmonov J. B., Kodirova M. A.**A quadratic stochastic operator with variable coefficients (98-107)13.

**Aripov M. M., Djabborov O. R.**Estimation and asymptotics of solutions the parabolic type equation with double non-linearity and damping (108-118)14.

**Kasimov Sh. G., Madrahimov U. S., Koshanov A. P.**On unique solvability of multidimensional initial-boundary problem of beam oscillations, one end of which is patched, and the other floating in Sobolev spaces (119-136)15.

**Irgashev B. Yu.**Construction of self-similar solutions for high-order equations having degeneracy of the first and second kind (137-143)16.

**Ruziev M. X.**On a boundary value problem for mixed type equation with singular coefficients (144-152)17.

**Umarova G. B.**Three-dimensional Tricomi problem for a parabolic-hyperbolic equation with two planes of change of type (153-166)18.

**Hayotov A. R., Rasulov R. G**. Extension of the Euler-Maclaurin quadrature formula in the space $W_2^(5,4)$ (167-176)19.

**Xolboev A. G.**The pursuit-evasion game on the 1-skeleton graph of Archimedean solids in the space $R^3$ (177-182)20.

**Xurramov N. X.**Generalization of the Tricomi Problem for one class of equations of mixed type (183-198)21.

**Shaimkulov B. A., Bozorov J. T.**Conditions for the holomorphic continuation into a unit polydisc of a function defined on the polydisc skeleton (199-203)