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arXiv 1306.3644math.AP
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一类半线性耗散双曲型方程通解的最优衰减估计

Optimal decay estimates for the general solution to a class of semi-linear dissipative hyperbolic equations

Marina Ghisi, Massimo Gobbino, Alain Haraux

摘要:

考虑一类半线性耗散双曲型方程,其中线性部分的算子具有非平凡核。在适当的非线性项假设下,我们证明了所有的解决方案衰减到0,t -> +无穷大,至少一样快,作为一个适当的负功率的t。此外,我们证明了这种衰减率是最佳的意义下,存在一个非空的开集的初始数据,相应的解决方案的衰减正好是负的权力t。我们的结果在抽象的希尔伯特空间中得到了陈述和证明,并应用于偏微分方程。

英文摘要:

We consider a class of semi-linear dissipative hyperbolic equations in which the operator associated to the linear part has a nontrivial kernel. Under appropriate assumptions on the nonlinear term, we prove that all solutions decay to 0, as t -> +infinity, at least as fast as a suitable negative power of t. Moreover, we prove that this decay rate is optimal in the sense that there exists a nonempty open set of initial data for which the corresponding solutions decay exactly as that negative power of t. Our results are stated and proved in an abstract Hilbert space setting, and then applied to partial differential equations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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