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A Boundary Value Problem with a Conormal Derivative for a Mixed-Type Equation of the Second Kind with a Conjugation Condition of the Frankl Type

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Abstract

In this paper, using the properties of generalized solutions in both the hyperbolic part and the elliptic part of a mixed domain, we study a boundary value problem with a conormal derivative for a mixed type equation of the second kind with Frankl-type conditions. The uniqueness of the solution to the problem under study is proven using the extremum principle, and its existence is proven by the method of integral equations. The theory of singular integral equations and Wiener–Hopf and Fredholm integral equations of the second kind are used to prove the existence of a solution to the problem.

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REFERENCES

  1. A. V. Bitsadze, Selected Works (Izd-vo Kabardino-Balkarskogo Nauchn. Tsentra Ross. Akad. Nauk, Nalchik, 2012).

    Google Scholar 

  2. F. I. Frankl, “On the problems of S. A. Chaplygin for mixed sub- and supersonic flows,” Izv. Akad Nauk SSSR Ser. Mat. 9 (2), 121–143 (1945).

    MathSciNet  MATH  Google Scholar 

  3. F. I. Frankl, Selected Works on Gas Dynamics (Nauka, Moscow, 1973).

    Google Scholar 

  4. M. S. Salakhitdinov and B. I. Islomov, Mixed-Type Equations with Two Degenerate Lines (Mumtoz suz, Tashkent, 2010).

  5. M. S. Salakhitdinov and D. Amanov, “The Poincare–Tricomi problem for the mixed-type equation with discontinuous coefficients,” in Mixed-Type Equations and Problems with Free Boundary (Fan, Tashkent, 1987), pp. 3–38.

  6. M. S. Salakhitdinov and Z. Kadyrov, “A problem with a normal derivative for an equation of mixed type with nonsmooth lines of degeneracy,” Differ. Uravn. 22 (1), 103–114 (1986).

    MathSciNet  MATH  Google Scholar 

  7. M. S. Salakhitdinov and B. I. Islomov, “A nonlocal boundary-value problem with conormal derivative for a mixed-type equation with two inner degeneration lines and various orders of degeneracy,” Russ. Math. 55, 42–49 (2011). https://doi.org/10.3103/S1066369X11010051

    Article  MATH  Google Scholar 

  8. E. I. Moiseev, T. E. Moiseev, and G. O. Vafodorova, “On an integral representation of the Neumann–Tricomi problem for the Lavrent’ev–Bitsadze equation,” Differ. Equations 51, 1065–1071 (2015). https://doi.org/10.1134/S0012266115080108

    Article  MathSciNet  MATH  Google Scholar 

  9. O. D. Algazin and A. V. Kopaev, “On the oblique derivative problem for the Lavrentyev–Bitsadze equation in the half-plane,” Mat. Mat. Model., No. 2, 1–8 (2016). https://doi.org/10.7463/mathm.0216.0843737

  10. M. M. Smirnov, Mixed-Type Equations (Vysshaya Shkola, Moscow, 1985).

    Google Scholar 

  11. I. L. Karol’, “On a boundary value problem for mixed-type elliptic-hyperbolic equation,” Dokl. Akad. Nauk SSSR 88, 197–200 (1953).

    MathSciNet  Google Scholar 

  12. N. K. Mamadaliev, “On representation of a solution to a modified Cauchy problem,” Sib. Math. J. 41, 889–899 (2000). https://doi.org/10.1007/BF02674745

    Article  MathSciNet  MATH  Google Scholar 

  13. S. S. Isamukhamedov and Zh. O. Oromov, “On boundary value problems for equations of mixed type of the second kind with a nonsmooth line of degeneracy,” Differ. Uravn. 18, 324–334 (1982).

    MathSciNet  Google Scholar 

  14. R. S. Khairullin, Tricomi Problem for Equation of the Second Kind with Strong Degeneration (Izd-vo Kazan. Univ., Kazan, 2015).

    Google Scholar 

  15. M. S. Salakhitdinov and N. B. Islamov, “A nonlocal boundary-value problem with the Bitsadze–Samarskii conditon for a parabolic-hyperbolic equation of the second kind,” Russ. Math. 59, 34–42 (2015). https://doi.org/10.3103/S1066369X15060067

    Article  MATH  Google Scholar 

  16. M. Mirsaburov and N. B. Islomov, “Problem with a Bitsadze–Samarskii condition on parallel characteristics for a mixed type equation of the second kind,” Differ. Equations 57, 1358–1371 (2021). https://doi.org/10.1134/S0012266121100104

    Article  MathSciNet  MATH  Google Scholar 

  17. K. B. Sabitov and I. P. Egorova, “On the correctness of boundary value problems for the mixed type equation of the second kind,” Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki 23, 430–451 (2019). https://doi.org/10.14498/vsgtu1718

    Article  Google Scholar 

  18. K. B. Sabitov and A. Kh. Suleimanova, “The Dirichlet problem for a mixed-type equation with characteristic degeneration in a rectangular domain,” Russ. Math. 53, 37 (2000). https://doi.org/10.3103/S1066369X0911005X

    Article  MATH  Google Scholar 

  19. B. I. Islomov and A. A. Abdullayev, “On a problem for an elliptic type equation of the second kind with a conormal and integral condition,” Nanosist.: Fiz., Khim., Mat. 9, 307–318 (2018). https://doi.org/10.17586/2220-8054-2018-9-3-307-318

    Article  Google Scholar 

  20. A. A. Abdullaev and T. G. Ergashev, “Poincare–Tricomi problem for the equation of a mixed elliptico-hyperbolic type of second kind,” Vestn. Tomsk. Gos. Univ. Mat. Mekh., No. 65, 5–21 (2020). https://doi.org/10.17223/19988621/65/1

  21. T. K. Yuldashev, B. I. Islomov, and A. A. Abdullaev, “On solvability of a Poincare–Tricomi type problem for an elliptic-hyperbolic equation of the second kind,” Lobachevskii J. Math. 42, 663–675 (2021). https://doi.org/10.1134/S1995080221030239

    Article  MathSciNet  MATH  Google Scholar 

  22. K. I. Babenko, On the Theory of Mixed-Type Equations (UMN, Moscow, 1953).

    Google Scholar 

  23. Smirnov, A.A., Molecular-Kinetic Theory of Metals (Nauka, Moscow, 1966).

    Google Scholar 

  24. A. V. Bitsadze, “On the uniqueness of the solution of Frankl’s problem for Chaplyguin’s equation,” Dokl. Akad. Nauk SSSR 112, 375–376 (1957).

    MathSciNet  MATH  Google Scholar 

  25. Yu. V. Devingtal’, “The existence and uniqueness of the solution of a problem of F.I. Frankl,” Izv. Vyssh. Uchebn. Zaved. Mat., No. 2, 39–51 (1958).

  26. Yu. V. Devingtal’, “Existence and uniqueness of the solution of the Frankl problem,” Usp. Mat. Nauk 14, 177–182 (1959).

    MathSciNet  Google Scholar 

  27. N. Yu. Kapustin and K. B. Sabitov, “On the solution of a problem in the theory of the Frankl problem for equations of mixed type,” Dokl. Math. 43, 584–588 (1991).

    MathSciNet  MATH  Google Scholar 

  28. A. P. Soldatov, “Solution of a certain boundary value problem with shift in the theory of functions,” Differ. Uravn. 10, 143–152 (1974).

    MathSciNet  Google Scholar 

  29. B. I. Islomov, N. K. Ochilova, and K. S. Sadarangani, “On a Frankl-type boundary-value problem for a mixed-type degenerating equation,” Ukr. Math. J. 71, 1541–1554 (2020). https://doi.org/10.1007/s11253-020-01730-z

    Article  MathSciNet  MATH  Google Scholar 

  30. K. B. Sabitov, “On the theory of the Frankl problem for equations of mixed type,” Izv. Math. 81, 99–136 (2017). https://doi.org/10.1070/IM8401

    Article  MathSciNet  MATH  Google Scholar 

  31. M. Mirsaburov, “Problem with analogs of the Frankl’ condition on a characteristic and the degeneration segment for an equation of mixed type with a singular coefficient,” Differ. Equations 53, 773–783 (2017). https://doi.org/10.1134/S0012266117060088

    Article  MathSciNet  MATH  Google Scholar 

  32. M. Mirsaburov and U. E. Bobomurodov, “Problem with Frankl and Bitsadze–Samarskii conditions on the degeneration line and on parallel characteristics for the Gellerstedt equation with a singular coefficient,” Differ. Equations 48, 737–744 (2012). https://doi.org/10.1134/S0012266112050126

    Article  MathSciNet  MATH  Google Scholar 

  33. M. Mirsaburov and S. T. Chorieva, “A problem with an analog of Frankl condition on the characteristics for Gellerstedt equation with singular coefficient,” Russ. Math. 61, 34–39 (2017). https://doi.org/10.3103/S1066369X17110056

    Article  MATH  Google Scholar 

  34. I. S. Gradshtein and I. M. Ryzhik, Tables of Integrals, Sums, Series, and Products (Vysshaya Shkola, Moscow, 1963; Academic Press, New York, 1965).

  35. M. S. Salakhitdinov and M. Mirsaburov, Nonlocal Problems for Mixed-Type Equation with Singular Coefficients (Universitet, Tashkent, 2005).

    Google Scholar 

  36. N. I. Muskhelishvili, Singular Integral Equations: Boundary Value Problems of Functions Theory and Their Applications to Mathematical Physics (Nauka, Moscow, 1968; Dordrecht, Springer, 1958). https://doi.org/10.1007/978-94-009-9994-7

  37. S. G. Samko, A. A. Kilbas, and O. I. Marichev, Fractional Integrals and Derivatives and Some of Their Applications (Nauka i Tekhnika, Minsk, 1987).

    MATH  Google Scholar 

  38. S. G. Mikhlin, Lecture Notes in Linear Integral Equations (Fizmatgiz, Moscow, 1959).

    Google Scholar 

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Islomov, B.I., Abdullayev, A.A. A Boundary Value Problem with a Conormal Derivative for a Mixed-Type Equation of the Second Kind with a Conjugation Condition of the Frankl Type. Russ Math. 66, 11–25 (2022). https://doi.org/10.3103/S1066369X2209002X

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