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An extension of H. Cartan's theorem
Authors:So-chin Chen   Shih-Biau Jang
Affiliation:Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan, Republic of China

Shih-Biau Jang ; Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan, Republic of China

Abstract:
In this article we prove that if $Dsubset mathbb{C}^n$, $nge 2$, is a bounded pseudoconvex domain with real analytic boundary, then for each $g(z)in mathrm{Aut}(D)$, there exists a fixed open neighborhood $Omega _g$ of $overline{D}$ and an open neighborhood $V_g$ of $g(z)$ in $mathrm{Aut}(D)$ such that any $h(z)in V_g$ can be extended holomorphically to $Omega _g$, and that the action defined by

begin{align*}pi:& V_gtimes Omega _gto mathbb{C}^n &(f,z)mapsto pi(f,z)=f(z) end{align*}

is real analytic in joint variables. This extends H. Cartan's theorem beyond the boundary. Some applications are also discussed here.

Keywords:Automorphism group   pseudoconvex domains   condition $R$
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