2022 - Bulletin of the Institute of Mathematics

Bulletin of the Institute of Mathematics
Founded in 2018
by
Uzbekistan Academy of Sciences
V.I.Romanovskiy Institute of Mathematics
and
Mathematical Society of Uzbekistan

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2022

Archive
Papers published in 2022



1. Kurudirek A. Methods of using non-Euclidean geometry concepts in the educational process. Bull. Inst. Math., 2022, Vol.5, №1, pp. 1-5  pdf
2. Samatov B. T., Jurayev B. I. The П-strategy in differential game with GrG-constraints on controls.  Bull. Inst. Math., 2022, Vol.5, №1, pp. 6-13  pdf
3. Azizov M. S. About an initial-boundary value problem for a partial differential equation of higher even order with the Bessel operator. Bull. Inst. Math., 2022, Vol.5, №1, pp. 14-24  pdf
4. Ganikhodjaev N. N., Dusmurodova G. Kh. Four-dimensional and five-dimensional algebras created by quadratic stochastic operators. Bull. Inst. Math., 2022, Vol.5, №1, pp. 25-30  pdf
5. Davlatov Sh. O. Solution of a mixed problem for symmetric t-hyperbolic systems in one-dimensional space by the method of finite elements on an irregular grid. Bull. Inst. Math., 2022, Vol.5, №1, pp. 31-36  pdf
6. Jumaev D. I., Beshimova D. R. Equivariant maps of hyperspaces. Bull. Inst. Math., 2022, Vol.5, №1, pp. 37-43  pdf
7. Imomov A. A., Nazarov Z. A. On structural parameter estimation of the Markov Q-process. Bull. Inst. Math., 2022, Vol.5, №1, pp. 44-55  pdf
8. Ismoilov A. I. Darboux problem for the inhomogeneous Euler-Poisson-Darboux equation. Bull. Inst. Math., 2022, Vol.5, №1, pp. 56-65  pdf
9. Makhammadaliev M. T. Gibbs measures for the Hard-Core model with a countable set of spin values on a Cayley tree of order two. Bull. Inst. Math., 2022, Vol.5, №1, pp. 66-73  pdf
10. Rasulov M. S., Norov A. K. Two free boundaries problem for a competitive-diffusion model. Bull. Inst. Math., 2022, Vol.5, №1, pp. 74-81  pdf
11. Rasulov S. I., Mustapokulov Kh. Y., Kuralov B. A. Monte Carlo Estimates for Fredholm Determinants. Bull. Inst. Math., 2022, Vol.5, №1, pp. 82-87  pdf
12. Rakhmonov F. D. Inverse problem for a higher order integral-differential equation with degenerate kernel. Bull. Inst. Math., 2022, Vol.5, №1, pp. 88-101  pdf
13. Turakulov Kh. Sh. On one semi-periodic boundary value problem for the model Tricomi equation in an unbounded parallelepiped domain. Bull. Inst. Math., 2022, Vol.5, №1, pp. 102-107  pdf
14. Urinov A. K. Generalizing Riemann-Liouville fractional order integrals and derivatives using Bessel’s functions. Bull. Inst. Math., 2022, Vol.5, №1, pp. 108-155  pdf
15. Yuldasheva A. V. On solvability of the nonlinear equation of the peridynamics. Bull. Inst. Math., 2022, Vol.5, №1, pp. 156-160  pdf

1. Durdiev D. K., Shishkina E. L., Rahmonov A. A. The explicit formula for a solution of wave differential equation with fractional derivatives in the multi-dimensional space. Bull. Inst. Math., 2022, Vol.5, №2, pp. 1-12  pdf
2. Mizomov I. E. On Calabi-Yau property of some classes of Koszul algebras. Bull. Inst. Math., 2022, Vol.5, №2, pp. 13-19  pdf
3. Mustapokulov Kh. Y., Bekchonov Sh. E. Necessary conditions for the invariance of a set with respect to a system with geometric constraints. Bull. Inst. Math., 2022, Vol.5, №2, pp. 20-25  pdf
4. Normatov Z. On a relation in the coordinate ring of the Calogero-Moser space. Bull. Inst. Math., 2022, Vol.5, №2, pp. 26-32  pdf
5. Xudayarov S. S. Quadratic stochastic processes of permutation matrix.  Bull. Inst. Math., 2022, Vol.5, №2, pp. 33-39  pdf
6. Abdullayev R. Z., Madaminov B. A. Isometries of generalized log -algebras constructed with respect to $\sigma$ -finite measures. Bull. Inst. Math., 2022, Vol.5, №2, pp. 40-46  pdf
7. Zuparov T. M., Khalkhadjayev B. B. The structure of the dependence of the terms of Abelian sums with random coefficients. Bull. Inst. Math., 2022, Vol.5, №2, pp. 47-50  pdf
8. Ibragimov M. M. Geometric properties of a unit ball of a neutral facially symmetric space. Bull. Inst. Math., 2022, Vol.5, №2, pp. 51-55  pdf
9. Rakhimov D. G., Akhmadjanova D. D. A model problem of the theory of electromagnetic oscillations in resonators without losses. Bull. Inst. Math., 2022, Vol.5, №2, pp. 56-61  pdf
10. Ruziev M. Kh., Yuldasheva N. T. A boundary value problem with the Gellerstedt condition and an analog of the Frankl condition for a mixed type equation.  Bull. Inst. Math., 2022, Vol.5, №2, pp. 62-71  pdf
11. Safarov J. Sh. Study of one integral-differential equation of hyperbolic type. Bull. Inst. Math., 2022, Vol.5, №2, pp. 72-76  pdf
12. Fozilov D. Sh. Cauchy type integral for bianalytic functions. Bull. Inst. Math., 2022, Vol.5, №2, pp. 77-84  pdf
13. Khatamov N. M., Ibragimov I. I. New Gibbs measures in the Ising model of the DNA molecule on the Cayley tree. Bull. Inst. Math., 2022, Vol.5, №2, pp. 85-90  pdf
14. Sharipov A. S., Abdishukurova G. M. On the some properties of the isometry group of foliated manifolds. Bull. Inst. Math., 2022, Vol.5, №2, pp. 91-96  pdf
15. Eshkabilov Y. Kh., Baratov B. S. On the dynamics of one separable cubic stochastic operator on the two-dimensional simplex. Bull. Inst. Math., 2022, Vol.5, №2, pp. 97-104  pdf
16. Yuldashev T. K., Egamnazarova M. G., Rasulova S. Kh. On a mixed problem for a fifth-order integro-differential equation with time reflection. Bull. Inst. Math., 2022, Vol.5, №2, pp. 105-116  pdf
17.  Zuparov Talat Marufovich dedicated to 80th Anniversary. Bull. Inst. Math., 2022, Vol.5, №2, pp. 117-118  pdf


1. Abbasova M. O. Recursion formulas for Lauricella functions in three variables. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
2. Abdushukurov A. A., Erisbaev S. A. On Fisher information function in competing risks model under random censoring from unobservation intervals and efficiency. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
3. Abdushukurov F. A., Chuprunov A. N. On asymptotics for probability in polynomial scheme. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
4. Abdug`aniyev A. A., Bakhramov J. A.  Synthesis of a suboptimal control in three dimensional time-optimal problem for the heat conductivity equation in a rod. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
5. Alimov Z. S.   On a boundary-value problem for the degenerate wave equation in a prismatic domain. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
6. Boltaev A. K., Davronov J. R.  A discrete analogue of the operator and its properties. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
7. Hasanov A. H., Ruzhansky M. V.  Systems of differential equations of Gaussian hypergeometric functions in three variables and their linearly-independent solutions. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
8. Imomnazarov Kh. Kh., Khujayev L. Kh., Yangiboev Z. Sh. The inverse problem for a system of poroelasticity equations: the case of an unknown coefficient with a lower term depending on time. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
9. Juraboyev S. S. The problem of describing the generators of a differential field of invariant differential rational functions with respect to the action of the group of real representations of symplectic transformations in a quaternion space. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
10. Khusanbayev Y. M., Toshkulov Kh. A. Limit theorems for a critical Galton - Watson branching processes starting with a large number of particles. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
11. Turdiev Kh. Kh., Suyarov T. R. Direct problem for an incompressible viscoelastic polymer fluid at rest. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
12. Abdullaev O. Kh. Inverse problems for parabolic-hyperbolic equation with non-linear load. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
13. Dadajanov R. N. On an existential specification with a single non-computable negative realization. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
14. Djabbarov N., Djalilov Sh.  On the divergence of the orbits of maps of a circle with two breaks. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
15. Ikromov I. A., Safarov A. R. Uniform estimates oscillatory integrals with smooth phase. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
16. Kudaybergenov K. K. On solution of Ayupov's problem. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
16. Urinov A. K., Mirsaburova U. M. A local and nonlocal conditional problem in boundary characteristics for a hyperbolic type equation with singular coefficient degenerating inside the domain. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf
17. Ergasheva D. A. Finite expansions for products of Pochhammer symbols. Bull. Inst. Math., 2022, Vol.5, №3, pp. 117-118  pdf

1. Abdushukurov A. A., Sayfulloyeva G. S. Empirical Kac processes in simple proportional hazards model under competing risks. Bull. Inst. Math., 2022, Vol.5, №4, pp. 1-6  pdf
2. Aripov M. M., Bobokandov M. M. Blow-up analysis for a doubly nonlinear parabolic non-divergence form equation with source term. Bull. Inst. Math., 2022, Vol.5, №4, pp. 7-21  pdf
3. Aripov M. М., Matyakubov A. S., Khasanov J. O. Global solvability and explicit estimation of solutions of a cross-diffusion parabolic system in non-divergent form with a source and variable density. Bull. Inst. Math., 2022, Vol.5, №4, pp. 22-31  pdf
4. Xadjiyev D., Ayupov Sh. A., Beshimov G. R. Euclidean and Galilean invariants of a parametric figure in the 2-dimensional Euclidean space. Bull. Inst. Math., 2022, Vol.5, №4, pp. 32-41  pdf
5. Kilichov O. Sh. On a boundary value problem for a fourth-order partial differential equation. Bull. Inst. Math., 2022, Vol.5, №4, pp. 42-47  pdf
6. Gafforov R. A. Equivalence of many-dimensional surfaces with respect to the action of special pseudo-orthogonal groups. Bull. Inst. Math., 2022, Vol.5, №4, pp. 48-54  pdf
7. Irgashev B. Y. Finding self-similar solutions of a high order equations and their application to the solution of the boundary problem for the fourth order equation. Bull. Inst. Math., 2022, Vol.5, №4, pp. 55-65  pdf
8. Mirsaburov M., Ergasheva S. B. On a problem in an unbounded domain with a missing Gellerstedt condition for a class of equations of mixed-type. Bull. Inst. Math., 2022, Vol.5, №4, pp. 66-83  pdf
9. Omirov B. A., Rakhimov I. S. The algebraic school of academician Shavkat Ayupov. Bull. Inst. Math., 2022, Vol.5, №4, pp. 84-96  pdf
10. Fayziev Yu. E. On a control problem for the subdiffusion equation in a rectangular domain. Bull. Inst. Math., 2022, Vol.5, №4, pp. 97-102  pdf
11. Khodjibaev V. R., Atakhujaev A. A. On the asymptotics of the distribution of the jump value for stochastic processes with continuous time. Bull. Inst. Math., 2022, Vol.5, №4, pp. 103-108  pdf
12. Khurramov N. Kh. Problem with Local and nonlocal conditions on the boundary characteristic for the Gellersttedt equation. Bull. Inst. Math., 2022, Vol.5, №4, pp. 109-118  pdf
13. Shadimetov Kh. M., Nuraliyev F. A., Ulikov Sh. Sh. Existence and uniqueness of a solution to a system of Wiener-Hopf type in a factorized Sobolev space. Bull. Inst. Math., 2022, Vol.5, №4, pp. 119-127  pdf

1. Ashurov R. R., Fayziev Y. E., Sulaymonov I. A. The inverse problem for determining the source function in the equation with the Hadamard fractional derivative. Bull. Inst. Math., 2022, Vol.5, №5, pp. 1-8 pdf
2. Azamatov A. Sh. Integration of the loaded Kaup-Boussinesq type system via inverse scattering method. Bull. Inst. Math., 2022, Vol.5, №5, pp. 9-20 pdf
3. Hoitmetov U. A. Integration of the Sine-Gordon Equation with Variable Time-Dependent Coefficients and Additional Terms. Bull. Inst. Math., 2022, Vol.5, №5, pp. 21-35 pdf
4. Imomov A., Meyliev A., Murtazaev M. On convergence rate in the Yaglom-type limit theorem of the theory of critical Markov branching processes. Bull. Inst. Math., 2022, Vol.5, №5, pp. 36-45 pdf
5. Karimov R. S. A norm of an error functional of the optimal difference formula in the Hilbert space. Bull. Inst. Math., 2022, Vol.5, №5, pp. 46-52 pdf
6. Karimov E. T., Turdiyev X. N. A boundary value problem for sub-diffusion equation involving generalized Hilfer derivative with a non-classical boundary condition. Bull. Inst. Math., 2022, Vol.5, №5, pp. 53-59 pdf
7. Rakhmonov U. S. Automorphisms for a matrix ball of the third type $\[B_{m,n}^{\left( 3 \right)}\]$ from space $\[{{\mathbb{C}}^{n}}\left[ m\times m \right]\]$.  Bull. Inst. Math., 2022, Vol.5, №5, pp. 60-68 pdf
8. Utebaev D., Nurullaev Zh. A. Accuracy estimates of the finite element method scheme for the dynamics equation of a compressible stratified rotating fluid. Bull. Inst. Math., 2022, Vol.5, №5, pp. 69-81 pdf
9. Allakov I., Muzropova N. S. The number of presentations of a natural number by the sum of the five squares of prime numbers. Bull. Inst. Math., 2022, Vol.5, №5, pp. 82-86 pdf
10. Allambergenov A. Kh. Local derivations of Okubo algebras. Bull. Inst. Math., 2022, Vol.5, №5, pp. 87-96 pdf
11. Ashurov R. R, Fayziev Yu. E, Khushvaktov N. Kh. Some problems for the Barenblatt-ZheltovKochina. Bull. Inst. Math., 2022, Vol.5, №5, pp. 97-107 pdf
12. Azamov A. A., Abdullaev A. X., Tilavov A. M. On the derivation of an inequality for estimating the accuracy of an approximate solution to the initial value problem. Bull. Inst. Math., 2022, Vol.5, №5, pp. 105-111 pdf
13. Azizov M. S. An initial boundary problem for a higher even order partial differential equation in a rectangle. Bull. Inst. Math., 2022, Vol.5, №5, pp. 112-133 pdf
14. Eshkobilova D. Т. On a topological transformations group of the space of idempotent probability measures. Bull. Inst. Math., 2022, Vol.5, №5, pp. 134-141 pdf
15. Kadirkulov B. J., Jalilov M. A. On an inverse problem for a non-local equation of mixed type of fractional order with degeneration. Bull. Inst. Math., 2022, Vol.5, №5, pp. 142-153 pdf
16. Karimov N. R. On a method of specification of negative structures. Bull. Inst. Math., 2022, Vol.5, №5, pp. 154-162 pdf
17. Karimov Sh. T., Oripov Sh., A., Khujakhonov Z. Z. The Cauchy problem for the degenerated partial differential equation of the high even order. Bull. Inst. Math., 2022, Vol.5, №5, pp. 163-171 pdf
18. Kurbanov O. T. On a boundary value problem with an integral condition for a third-order equation with multiple characteristics. Bull. Inst. Math., 2022, Vol.5, №5, pp. 172-175 pdf
19. Muminov U. B, Hudayorov U. O. Integration of loaded terms and source defocused nonlinear Schrodinger equations in the class of infinite zonal periodic functions. Bull. Inst. Math., 2022, Vol.5, №5, pp. 176-183 pdf
20. Sharipov O.Sh., Muhtorov I.G. On moment inequality for weakly dependent random variables with values in type p Banach spaces. Bull. Inst. Math., 2022, Vol.5, №5, pp. 184-186 pdf
21. Sirojitdinov A. A. Refinements of one Feller's theorem. Bull. Inst. Math., 2022, Vol.5, №5, pp. 187-193 pdf
22. Yuldasheva N. T. Bitsadze-Samarskii type problem for a mixed type equation with a fractional derivative. Bull. Inst. Math., 2022, Vol.5, №5, pp. 194-207 pdf

1. Boltaev Kh. Kh. Irreducible hyperfinite real subfactors and their indexes. Bull. Inst. Math., 2022, Vol.5, №6, pp. 1-5 pdf
2. Dadakhodjaev R. A., Zokirov F. M. Ring isomorphisms between algebras of measurable operators affiliated with real ${{W}^{*}}$ - algebras of type ${{II}_{1}}$. Bull. Inst. Math., 2022, Vol.5, №6, pp. 6-8 pdf
3. Ergashova Sh. R.Topological spaces generated by discrete subspaces. Bull. Inst. Math., 2022, Vol.5, №6, pp. 9-13 pdf
4. Hayotov A. R., Khayriev U. N. Optimal quadrature formulas for approximate calculation of integrals with exponential weight. Bull. Inst. Math., 2022, Vol.5, №6, pp. 14-22 pdf
5. Rajabov S. M. On dynamics of a non-volterra quadratic operator. Bull. Inst. Math., 2022, Vol.5, №6, pp. 23-31 pdf
6. Abdushukurov A.A. Sayfulloyeva G.S. Estimation of the integral hazard functions from Kac type statistics. Bull. Inst. Math., 2022, Vol.5, №6, pp. 32-36 pdf
7. Allakov I., Abraev B. Kh. On solvability conditions of a pair of linear equations with four unknowns in prime numbers. Bull. Inst. Math., 2022, Vol.5, №6, pp. 37-49 pdf
8. Ahmadov I.A. Solvability and Volterness of a boundary problem with local conditions for a mixed parabolic-hyperbolic equation with a fractional order operator in a sense of Gerasimov-Caputo. Bull. Inst. Math., 2022, Vol.5, №6, pp. 50-63 pdf
9. Boltaev A. K. Existence and uniqueness of the obtained system solution for optimal coefficients. Bull. Inst. Math., 2022, Vol.5, №6, pp. 64-71 pdf
10. Djamalov S. Z., Turakulov Kh. Sh. On a linear inverse problem for the threedimensional Tricomi equation with nonlocal boundary conditions in a prismatic unbounded domain. Bull. Inst. Math., 2022, Vol.5, №6, pp. 72-82 pdf
11. Zarifzoda S. K. Integration of linear operator-differential equations by using of ${{S}_{\alpha }}$ - integral transformation. Bull. Inst. Math., 2022, Vol.5, №6, pp. 83-91 pdf
12. Ibragimov G. I., Qushaqov H. Sh., Muhammadjonov A. A. An infinite system of differential equations with nonnegative coefficients in the Hilbert space ${{l}_{2}}$. Bull. Inst. Math., 2022, Vol.5, №6, pp. 92-99 pdf
13. Mamajonov S.M. The third boundary problem for a fourth-order non-homogeneous equation with constant coefficients. Bull. Inst. Math., 2022, Vol.5, №6, pp. 100-109 pdf
14. Mamatov A. R. Algorithm for solving one maximin problem of evasionapproach. Bull. Inst. Math., 2022, Vol.5, №6, pp. 100-118 pdf
15. Nurmukhamedova N. S. Local asymptotic normality of statistical experiments in an inhomogeneous competing risks model under random censoring on the right. Bull. Inst. Math., 2022, Vol.5, №6, pp. 119-126 pdf
16. Khalkhuzhaev A.M. , Mahmudov H.Sh. Asymptotic expansions eigenvalues of the two-particle operator SchrЁodinger on the lattice. Bull. Inst. Math., 2022, Vol.5, №6, pp. 127-138 pdf
17. Khodjamuratova I. A. On the representability over equivalences of translationally complete finitely generated algebras and semigroups. Bull. Inst. Math., 2022, Vol.5, №6, pp. 139-144 pdf
18. Sharipov O. Sh. Kobilov U. Kh. On the maximum of weakly dependent random variables. Bull. Inst. Math., 2022, Vol.5, №6, pp. 145-148 pdf
19. Ergashev T. G., Vokhobov F. F., Makhmudov B. B. The confluent hypergeometric functions of three variables. Bull. Inst. Math., 2022, Vol.5, №6, pp. 149-177 pdf
20. Erisbaev S. A. Calculation of Fisher information in the competing risks model under combined hybrid random censoring on the right. Bull. Inst. Math., 2022, Vol.5, №6, pp. 178-181 pdf
21. Eshmamatova D. B., Tadjieva M. A., Yusupov F. A. Asymptotic behavior of trajectories of some Lotka Volterramappings operating in a two-dimensional simplex with transitive tournaments. Bull. Inst. Math., 2022, Vol.5, №6, pp. 182-195 pdf
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