Titlebook: Asymptotic Methods for Investigating Quasiwave Equations of Hyperbolic Type; Yu. Mitropolskii,G. Khoma,M. Gromyak Book 1997 Springer Scien

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Random Walks and Renewal Theory,This chapter singles out some new classes of periodic boundary value problems for the second order wave differential equations of hyperbolic type (.-systems of the first class, i. e. periodic boundary value problems such that their solutions do not include solutions of the corresponding homogeneous periodic boundary value problem).

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Periodic Solutions of the Second Class Systems,In this chapter, we continue studying periodic boundary value problems for the second order wave differential equations of hyperbolic type. In particular, we single out and study .-systems of the second class, i. e. the periodic boundary value problems solutions of which contain solutions of the corresponding homogeneous periodic problem.

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