Geodesic
Spectrum and stabilization in hyperbolic problems
Trudy Seminara im. I.G. Petrovskogo, Trudy Seminara imeni I. G. Petrovskogo, Tome 31 (2016) no. 31, pp. 231-256

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We study the connection between the stabilization of solutions of a mixed hyperbolic problem and spectral properties of the corresponding elliptic boundary value problem. We consider the first mixed problem for the wave equation in bounded and unbounded domains in $\mathbb R^n$, determine the class of its energy solutions, and represent the solutions in terms of the Bochner–Stieltjes integral. We study how the spectrum of the elliptic operator affects the behavior of local energy of a solution and describe a method which allows us to study the stabilization of solutions with the help of estimates in the spectral parameter for solutions of the stationary problem on the upper half-plane. 
@article{TSP_2016_31_31_a10,
     author = {A. V. Filinovskii},
     title = {Spectrum and stabilization in hyperbolic problems},
     journal = {Trudy Seminara im. I.G. Petrovskogo},
     pages = {231--256},
     publisher = {mathdoc},
     volume = {31},
     number = {31},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TSP_2016_31_31_a10/}
}
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A. V. Filinovskii. Spectrum and stabilization in hyperbolic problems. Trudy Seminara im. I.G. Petrovskogo, Trudy Seminara imeni I. G. Petrovskogo, Tome 31 (2016) no. 31, pp. 231-256. http://geodesic.mathdoc.fr/item/TSP_2016_31_31_a10/