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arXiv 2008.06984math.CVmath.CAmath.FA
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多元含参泛泰勒级数

Universal Taylor Series in several variables depending on parameters

Giorgos Gavrilopoulos, Konstantinos Maronikolakis, Vassili Nestoridis

摘要:

建立了平面单连通域$Ω_i$的积$Ω= \prod Ω_i$上的泛泰勒级数的通有存在性,其中泛逼近在平面紧集的积$K$上成立,并给出了$K \cap Ω= \emptyset$ .这些类是关于一个或几个中心的扩展和普遍的逼近是在功能或在所有的衍生物的水平。此外,如果对于所有$i$连接$K \cap \overlineΩ = \emptyset$和$\{\infty\} \cup [\mathbb{C} \setminus \overlineΩ_i]$,则通用函数可以平滑到边界。所有以前的泛级数都可能依赖于某些参数,那么可逼近函数也可能依赖于相同的参数,如本文所示。这些普适性是拓扑和代数通用的。

英文摘要:

We establish generic existence of Universal Taylor Series on products $Ω= \prod Ω_i$ of planar simply connected domains $Ω_i$ where the universal approximation holds on products $K$ of planar compact sets with connected complements provided $K \cap Ω= \emptyset$. These classes are with respect to one or several centers of expansion and the universal approximation is at the level of functions or at the level of all derivatives. Also, the universal functions can be smooth up to the boundary, provided that $K \cap \overlineΩ = \emptyset$ and $\{\infty\} \cup [\mathbb{C} \setminus \overlineΩ_i]$ is connected for all $i$. All previous kinds of universal series may depend on some parameters; then the approximable functions may depend on the same parameters, as it is shown in the present paper. These universalities are topologically and algebraically generic.

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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