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On the Dirichlet Problem in Rectangular Domain for Lavrentiev–Bitsadze Equation

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Abstract

We consider the Dirichlet problem in the rectangular domain for the Lavrentiev–Bitsadze equation. We find the existence conditions of the problem solution. The formulation of these conditions depend on the domain geometry, namely, on the ratio of rectangle sides from the region of hyperbolicity of the equation. Unlike other studies of similar problems, the existence conditions are obtained for the case when this ratio is a transcendental number.

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REFERENCES

  1. A. V. Bitsadze, “To the problem of equations of mixed type,” Tr. Mat. Inst. Akad. Nauk SSSR 41, 3–59 (1953).

    Google Scholar 

  2. S. P. Pul’kin, “The Tricomi problem for the general equation of Lavrentiev–Bitzadze,” Dokl. Akad. Nauk SSSR 118 (1), 38–41 (1958).

    MathSciNet  MATH  Google Scholar 

  3. K. B. Sabitov, “The Tricomi problem for the Lavrent’ev–Bitsadze equation with a spectral parameter,” Differ. Uravn. 22, 1977–1984 (1986).

    Google Scholar 

  4. A. P. Soldatov, “Problems of Dirichlet type for the Lavrent’ev–Bitsadze equation. I: Uniqueness theorems,” Dokl. Math. 48, 410–414 (1994).

    Google Scholar 

  5. A. P. Soldatov, “Problems of Dirichlet type for the Lavrent’ev–Bitsadze equation. II: Existence theorems,” Dokl. Math. 48, 433–437 (1994).

    Google Scholar 

  6. J. R. Cannon, “A Dirichlet problem for an equation of mixed type with a discontinuous coefficient,” Annali Matematica Pura Applicata 61, 371–377 (1963). https://doi.org/10.1007/BF02410656

    Article  MathSciNet  MATH  Google Scholar 

  7. T. I. Demina, “Mixed problem for Lavrent’ev–Bitsadze equation in a rectangular domain,” Dokl. Adygskoi Mezhdunarodnoi Akad. Nauk 8 (1), 30–37 (2005).

    Google Scholar 

  8. T. I. Demina, “On one mixed problem for Lavrent’ev–Bitsadze equation in a rectangular domain,” Izv. Vyssh. Uchebn. Zaved. Sev.-Kavkazskii Region. Estestv. Nauki, No. S11, 4–7 (2006).

    Google Scholar 

  9. A. Bakhristova, “Dirichlet problem for mixed-type Lavrent’ev–Bitsadze equation,” Tr. Sterlitamaksk. Filiala Akad. Nauk Resp. Bashkortostan. Ser. Fiz.-Mat. Tekh. Nauki, No. 3, 33–39 (2006).

    Google Scholar 

  10. A. A. Bakhristova, “The Neumann problem for a mixed-type equation in a rectangular domain,” Russ. Math. 53, 9–15 (2009). https://doi.org/10.3103/S1066369X09110024

    Article  MathSciNet  MATH  Google Scholar 

  11. K. B. Sabitov, “Dirichlet problem for mixed-type equations in a rectangular domain,” Dokl. Math. 75, 193–196 (2007). https://doi.org/10.1134/S1064562407020056

    Article  MathSciNet  MATH  Google Scholar 

  12. K. B. Sabitov and A. Kh. Suleimanova, “The Dirichlet problem for a mixed-type equation of the second kind in a rectangular domain,” Russ. Math. 51, 42–50 (2007). https://doi.org/10.3103/S1066369X07040068

    Article  MATH  Google Scholar 

  13. 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 (2009). https://doi.org/10.3103/S1066369X0911005X

    Article  MATH  Google Scholar 

  14. K. B. Sabitov and E. V. Vagapova, “Dirichlet problem for an equation of mixed type with two degeneration lines in a rectangular domain,” Differ. equations 49, 68–78 (2013). https://doi.org/10.1134/S0012266113010072

    Article  MathSciNet  MATH  Google Scholar 

  15. R. S. Khairullin, “On the Dirichlet problem for a mixed-type equation of the second kind with strong degeneration,” Differ. Equations 49, 510–516 (2013). https://doi.org/10.1134/S0012266113040113

    Article  MathSciNet  MATH  Google Scholar 

  16. R. S. Khairullin, “Solvability of the Dirichlet problem for a mixed-type equation of the second kind,” Differ. Equations 53, 677–685 (2017). https://doi.org/10.1134/S0012266113040113

    Article  MathSciNet  MATH  Google Scholar 

  17. K. B. Sabitov and R. M. Safina, “The first boundary-value problem for an equation of mixed type with a singular coefficient,” Izv.: Math. 82, 318–350 (2018). https://doi.org/10.1070/IM8596

    Article  MathSciNet  MATH  Google Scholar 

  18. K. F. Roth, “Rational approximations to algebraic numbers,” Mathematika 2, 1–20 (1955). https://doi.org/10.1112/S0025579300000644

    Article  MathSciNet  MATH  Google Scholar 

  19. W. M. Schmidt, Diophantine Approximation, Lecture Notes in Mathematics, Vol. 785 (Springer, Berlin, 1980). https://doi.org/10.1007/978-3-540-38645-2

  20. Y. Bugeaud, Distribution Modulo One and Diophantine Approximation, Cambridge Tracts in Mathematics, Vol. 193 (Cambridge Univ. Press, Cambridge, 2012).

  21. J. M. Borwein and P. B. Borwein, Pi and the AGM: A Study in Analytic Number Theory and Computational Complexity (Wiley, New York, 1987).

    MATH  Google Scholar 

  22. D. Zeilberger and W. Zudilin, “The irrationality measure of π is at most 7.103205334137?,” Moscow J. Combinatorics Number Theory 9, 407–419 (2020). https://doi.org/10.2140/moscow.2020.9.407

    Article  MathSciNet  MATH  Google Scholar 

  23. G. Rhin and C. Viola, “The group structure for ζ(3),” Acta Arithmetica 97 (3), 269–293 (2001).

    Article  MathSciNet  MATH  Google Scholar 

  24. W. Zudilin, “Remarks on irrationality of q-harmonic series,” Manuscripta Math. 107, 463–477 (2002). https://doi.org/10.1007/s002290200249

    Article  MathSciNet  MATH  Google Scholar 

  25. T. Matala-Aho, K. Vaananen, and W. Zudilin, “New irrationality measures for q-logarithms,” Math. Comput. 75, 879–889 (2006). https://doi.org/10.1090/S0025-5718-05-01812-0

    Article  MathSciNet  MATH  Google Scholar 

  26. E. B. Tomashevskaya, “On the irrationality measure of the number log 5 + π/2 and some other numbers,” Chebyshevsk. Sb. 8 (2), 97–108 (2007).

    MathSciNet  MATH  Google Scholar 

  27. R. Marcovecchio, “The Rhin–Viola method for log 2,” Acta Arithmetica 139, 147–184 (2009).

    Article  MathSciNet  MATH  Google Scholar 

  28. W. Zudilin, “Two hypergeometric tales and a new irrationality measure of ζ(2),” Ann. Mathématiques Québec 38, 101–117 (2014). https://doi.org/10.1007/s40316-014-0016-0

    Article  MathSciNet  MATH  Google Scholar 

  29. I. V. Bondareva, M. Yu. Luchina, and V. Kh. Salikhov, “Symmetrized polynomials in a problem of estimating of the irrationality measure of number ln 3,” Chebyshevsk. Sb. 19 (1), 15–25 (2018). https://doi.org/10.22405/2226-8383-2018-19-1-15-25

    Article  MATH  Google Scholar 

  30. V. Kh. Salikhov and M. G. Bashmakova, “On irrationality measure of arctan 1/3,” Russ. Math. 63, 61–66 (2019). https://doi.org/10.3103/S1066369X19010079

    Article  MATH  Google Scholar 

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Abashkin, A.A. On the Dirichlet Problem in Rectangular Domain for Lavrentiev–Bitsadze Equation. Russ Math. 67, 1–7 (2023). https://doi.org/10.3103/S1066369X23050018

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