Abstract
The problem stated in the paper is to find solutions of equation (1) in the strip 0≤y≤a, and satisfying conditions (2), (3), α1, α1, α2,z, δ andf being functions which satisfy suitable conditions. This problem is equivalent with that to find solutions of (4), (5). If δ=0, the problem is one of generalized periodicity. Theorem 1–3 give sufficient conditions for the existence of required solutions.
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References
Cesari L.,A criterion for the existence in a strip of periodic solutions of hyperbolic differential equations., Rend. Circolo Mat. di Palermo, (2)14 (1965), 95–118.
Haimovici A.,Periodic solutions of differential equations with set functions as unknowns, Revue Roumaine de Math. pures et appliquées,19 (1974), 161–170.
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Haimovici, A. On «bilocal» and periodicity problems for hyperbolic partial differential equations. Rend. Circ. Mat. Palermo 28, 239–257 (1979). https://doi.org/10.1007/BF02844098
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DOI: https://doi.org/10.1007/BF02844098