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      Large time behavior for the nonlinear dissipative Boussinesq equation

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          Abstract

          In this paper, we study the nonlinear dissipative Boussinesq equation in the whole space \(\mathbb{R}^n\) with \(L^1\) integrable data. As our preparations, the optimal estimates as well as the optimal leading terms for the linearized model are derived by performing the WKB analysis and the Fourier analysis. Then, under some conditions on the power \(p\) of nonlinearity, we demonstrate global (in time) existence of small data Sobolev solutions with different regularities to the nonlinear model by applying some fractional order interpolations, where the optimal growth (\(n=2\)) and decay (\(n\geqslant 3\)) estimates of solutions for large time are given. Simultaneously, we get a new large time asymptotic profile of global (in time) solutions. These results imply some influence of dispersion and dissipation on qualitative properties of solution.

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          Journal
          07 November 2023
          Article
          2311.03802
          03486db5-048c-4586-bc30-443072f3e94c

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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