English

Prescribing Oscillation Behavior of Solutions to the Heat Equation on $\mathbb{R}^n$ via the Initial Data and its Average Integral

Analysis of PDEs 2021-03-12 v1

Abstract

\begin{abstract} Motivated by a classical stabilization result for solution to the Cauchy problem of the heat equation tu=u \ \partial_{t}u=\bigtriangleup u\ on Rn\mathbb{R}^{n}, we consider its oscillation behavior with radial initial data φ(x)=φ(x)C0(Rn)L(Rn). \varphi\left( x\right) =\varphi\left( \left\vert x\right\vert \right) \in C^{0}\left( \mathbb{R}^{n}\right) \bigcap L^{\infty}\left( \mathbb{R}^{n}\right) .\ Given four arbitrary finite numbers r<α<β<s,r<\alpha <\beta<s, one can construct a radial \varphi\in C^{0}\left( \mathbb{R}% ^{n}\right) \bigcap L^{\infty}\left( \mathbb{R}^{n}\right) so that φ \varphi\ together with its corresponding solution u(x,t)\ u\left( x,t\right) satisfy the oscillation behavior: \begin{align*} \liminf_{\tau\rightarrow\infty}\varphi\left( \tau\right) & =r<\liminf _{t\rightarrow\infty}u\left( 0,t\right) =\alpha & <\limsup_{t\rightarrow\infty}u\left( 0,t\right) =\beta<\limsup _{\tau\rightarrow\infty}\varphi\left( \tau\right) =s. \end{align*} Another related topic concerning the oscillation behavior of the average integral of the initial data is also discussed. \end{abstract}

Keywords

Cite

@article{arxiv.2103.06448,
  title  = {Prescribing Oscillation Behavior of Solutions to the Heat Equation on $\mathbb{R}^n$ via the Initial Data and its Average Integral},
  author = {Dong-Ho Tsai},
  journal= {arXiv preprint arXiv:2103.06448},
  year   = {2021}
}