On stability of determination of Riemann surface from its DN-map

preprint2022arXivOpen access

Abstract

Suppose that MM is a Riemann surface with boundary ∂M\partial M, ΛΛ is its DN-map, and E:M→Cn\mathscr E:M\to\mathbb{C}^{n} % JM\mathfrak{J}_{M} is a holomorphic immersion. Let M′M' be diffeomorphic to MM, ∂M=∂M′\partial M=\partial M'; let Λ′Λ' be the DN map of M′M'. Let us write M′∈MtM'\in\mathbb M_t if ∥Λ′−Λ∥H1(∂M)→L2(∂M)⩽t\parallelΛ'-Λ\parallel_{H^{1}(\partial M)\to L_{2}(\partial M)}\leqslant t holds. We show that, for any holomorphic immersion E:M→Cn\mathscr{E}: M \to \mathbb C^n (n⩾1n\geqslant 1), the relation \begin{equation*} \sup_{M'\in \mathbb{M}_{t}}\inf_{\mathscr{E}'}d_{H}(\mathscr E'(M'),\mathscr{E}(M))\underset{t\to 0}{\longrightarrow}0, \end{equation*} holds, where dHd_H is the Haussdorf distance in Cn\mathbb C^n and the infimum is taken over all holomorphic immersions E′:M′↦Cn\mathscr E': M'\mapsto\mathbb C^n.

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