Abstract
We analyze the well-posedness of a problem with multipoint conditions in the time variable and periodic conditions in the spatial coordinates for differential operators decomposable into operators of the first order with complex coefficients. We establish conditions for the existence and uniqueness of the classical solution of the problem under consideration and prove metric theorems for the lower estimates of small denominators appearing in the process of construction of the solution.
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References
B. I. Ptashnyk, “De-la-Vallée-Poussin-type problem for hyperbolic equations with constant coefficients,”Dokl. Akad. Nauk Ukr. SSR, No. 10, 1254–1257 (1966).
B.I. Ptashnyk, “Ann-linear problem for hyperbolic equations with constant coefficients,”Visn. Lviv. Politekh. Inst., No. 16, 80–87 (1967).
B.I. Ptashnyk, “De-la-Vallée-Poussin-type problem for hyperbolic equations with variable coefficients,”Dokl. Akad. Nauk Ukr. SSR, No. 2, 127–130(1967).
B. I. Ptashnyk, “An analog of then-point problem for a linear hyperbolic equation,”Ukr. Mat. Zh.,23, No. 4, 472–478 (1961).
B.I. Ptashnyk,Ill-Posed Boundary-Value Problems for Partial Differential Equations [in Russian], Naukova Dumka, Kiev 1984.
B. I. Ptashnyk, V. V. Figol’, and P. I. Shtabalyuk, “Solvability, stability, and regularization of multipoint problems for hyperbolic equations,”Mat. Studii. Tr. Lviv. Mat. Tovarystva, Issue 1, 10–32 (1991).
é. R. Atamonov, “On the uniqueness and stability of solutions of multipoint problems for pseudohyperbolic equations,” in:Well-Posedness of Problems in Mathematical Physics, Computer Center, Siberian Division, Academy of Sciences of the USSR, Novosibirsk (1977), pp. 12–32.
Yu. N. Valitskii, “On the well-posedness of multipoint problem for differential equations with operator coefficients,”Dokl. Akad. Nauk SSSR,286, No. 5, 1041–1043 (1986).
Yu. N. Valitskii, “Well-posedness of multipoint problems for equations with operator coefficients,”Sib. Mat. Zh.,29, No. 4, 46–53 (1988).
V. G. Romanov, “On the local solvability of some multidimensional inverse problems for hyperbolic equations,”Differents. Uravn.,25, No. 2, 275–283 (1989).
V. I. Gorbachuk and M. L. Gorbachuk,Boundary-Value Problems for Operator-Differential Equations [in Russian], Naukova Dumka, Kiev 1984.
V. G. Sprindzhuk,Metric Theory of Diophantine Approximations [in Russian], Nauka, Moscow 1977.
G. Sansone,Ordinary Differential Equations [Russian translation], Inostrannaya Literatura, Vol. 1, Moscow (1953).
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Ptashnyk, B.I., Sylyuga, L.P. Multipoint problem for typeless factorized differential operators. Ukr Math J 48, 75–89 (1996). https://doi.org/10.1007/BF02390985
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DOI: https://doi.org/10.1007/BF02390985