Scaling variables and asymptotic profiles for the semilinear damped wave equation with variable coefficients

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• 作者：Yuta Wakasugi ^{yuta.wakasugi@math.nagoya-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Semilinear damped wave equation ; Diffusion phenomena ; Scaling variables
• 刊名：Journal of Mathematical Analysis and Applications
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：447
• 期：1
• 页码：452-487
• 全文大小：606 K

文摘

We study the asymptotic behavior of solutions for the semilinear damped wave equation with variable coefficients. We prove that if the damping is effective, and the nonlinearity and other lower order terms can be regarded as perturbations, then the solution is approximated by the scaled Gaussian of the corresponding linear parabolic problem. The proof is based on the scaling variables and energy estimates.