In this chapter, we study the inverse problem for the fractional semilinear equation with the exterior Dirichlet data of the form \(\displaystyle \begin {cases} (-\varDelta )^{s}u+a(x,u)=0 & \mbox{ in }\varOmega ,\\ u=f & \mbox{ in }\varOmega _{e}, \end {cases} \) where \(s\in (0,1)\) . A standard technique to handle nonlinear equations is to differentiate the equation to obtain a useful linear equation, and there are various ways for this purpose. We introduce higher-order linearization method so that one can prove the global uniqueness of certain nonlinear equations. Moreover, thanks to the nonlocality, we can also demonstrate a uniqueness result, without using any linearization scheme.

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Inverse Problems for Fractional Semilinear Elliptic Equations

  • Yi-Hsuan Lin,
  • Hongyu Liu

摘要

In this chapter, we study the inverse problem for the fractional semilinear equation with the exterior Dirichlet data of the form \(\displaystyle \begin {cases} (-\varDelta )^{s}u+a(x,u)=0 & \mbox{ in }\varOmega ,\\ u=f & \mbox{ in }\varOmega _{e}, \end {cases} \) where \(s\in (0,1)\) . A standard technique to handle nonlinear equations is to differentiate the equation to obtain a useful linear equation, and there are various ways for this purpose. We introduce higher-order linearization method so that one can prove the global uniqueness of certain nonlinear equations. Moreover, thanks to the nonlocality, we can also demonstrate a uniqueness result, without using any linearization scheme.