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arXiv 2002.06319math.APmath.FA
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一类具有对数阻尼的wave equations方程解的渐近分布和最优衰减

Asymptotic profile and optimal decay of solutions of some wave equations with logarithmic damping

Ruy Coimbra Charao, Ryo Ikehata

摘要:

本文提出了一种新的具有对数阻尼机制的非局部波动方程模型。我们考虑了新模型在全空间上的Cauchy问题。我们研究的渐近轮廓和最佳的衰减和爆破率的解决方案,随着时间的推移到无穷大。本文所考虑的阻尼项迄今为止还没有研究过,并且在低频参数下,阻尼的有效性比已经研究得很好的分数型非局部阻尼的有效性要弱。为了在时间上得到最优估计,我们遇到了所谓的具有特殊参数的超几何函数。

英文摘要:

We introduce a new model of the nonlocal wave equations with a logarithmic damping mechanism. We consider the Cauchy poroblem for the new model in the whole space. We study the asymptotic profile and optimal decay and blowup rates of solutions as time goes to infinity. The damping terms considered in this paper is not studied so far, and in the low frequency parameters the damping is rather weakly effective than that of well-studied fractional type of nonlocal damping. In order to get the optimal estimates in time we meet the so-called hypergeometric functions with special parameters.

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