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arXiv 2302.02606math.AGmath.GT
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函数在正规交叉上的实解析扩张

Real analytic extension of functions on normal crossings

Masato Tanabe

摘要:

我们考虑一个紧致的$C^ω$流形$X$和$X$的许多正则$C^ω$子流形$Y_1, \dots, Y_q$,它们是$X$中的闭子集,使得$Y_j$的并只有正规交叉.我们证明了在每个$Y_j$上的类为$C^ω$的并上的每个连续函数都可以扩展为$X$上的$C^ω$函数.我们证明的一个重要特点是使用了实解析几何的基本工具--嘉当定理A和B。

英文摘要:

We consider a compact $C^ω$ manifold $X$ and finitely many regular $C^ω$ submanifolds $Y_1, \dots, Y_q$ of $X$, which are closed subsets in $X$, such that the union of $Y_j$'s has only normal crossings. We show that every continuous function on the union which is of class $C^ω$ on each $Y_j$ can be extended to a $C^ω$ function on $X$. A crucial feature of our proof is to employ basic tools of real analytic geometry -- Cartan Theorems A and B.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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