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Equivalence between observability at the boundary and stabilization for transmission problem of the wave equation

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Abstract

In this article, we have studied the transmission problem of a system of hyperbolic equations consisting of a free wave equation and a wave equation with dissipation on the boundary, each one acting on a part of its one-dimensional domain. This paper proves the equivalence between the exponential stability previously proven by Liu and Williams (Bull Aust Math Soc 97:305–327, 1998) and the inequality observability on the boundary as a result of this paper. First of all, we have built an auxiliary problem on where we extracted some slogans to be used later. Then we have introduced a number \({\mathcal {X}}>0\) representing the difference between the speed of wave propagation in each part of the domain, and we proved one observability inequality on the boundary. Finally, we proved the equivalence between the two properties.

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Authors and Affiliations

  1. Interdisciplinary Innovation Laboratory - LabX, Department of Mathematics, Federal University of Pará, Raimundo Santana Street, s/n, Salinópolis, PA, 68721-000, Brazil

    A. J. A. Ramos

  2. Federal University of Pará, Augusto Corrêa Street, 01, Belém, PA, 66075-110, Brazil

    M. W. P. Souza

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  1. A. J. A. Ramos
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  2. M. W. P. Souza
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Correspondence to A. J. A. Ramos.

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Ramos, A.J.A., Souza, M.W.P. Equivalence between observability at the boundary and stabilization for transmission problem of the wave equation. Z. Angew. Math. Phys. 68, 48 (2017). https://doi.org/10.1007/s00033-017-0791-y

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  • DOI: https://doi.org/10.1007/s00033-017-0791-y

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