Cross theorem

Details Cross theorem Cross theorem

2001-02-17

arxiv.org/abs/math/0102136v1

Ann. Polon. Math. 77 (2001), 295-302

Mathematics

Complex Variables

8 pages

Scientific paper

Let $D, G\subset{\Bbb C}$ be domains, let $A\subset D$, $B\subset G$ be locally regular sets, and let $X:=(D\times B)\cup(A\times G)$. Assume that $A$ is a Borel set. Let $M$ be a proper analytic subset of an open neighborhood of $X$. Then there exists a pure 1-dimensional analytic subset $\hat M$ of the envelope of holomorphy $\hat X$ of $X$ such that any function separately holomorphic on $X\setminus M$ extends to a holomorphic function on $\hat X\setminus\hat M$. The result generalizes special cases which were studied in \cite{\"Okt 1998}, \cite{\"Okt 1999a}, and \cite{Sic 2000}.

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