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arXiv 1502.00826math.MG
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超凸度量空间的胶合

Gluing hyperconvex metric spaces

Benjamin Miesch

摘要:

我们研究如何粘合超凸(或内射)度量空间,使所得空间保持超凸。我们给出了两个新的标准,一方面说,沿着强凸子集的胶合,另一方面胶合沿外部超凸子集导致超凸空间。此外,我们通过一个例子表明,这两种情况下,胶合工程是对立的,不能结合起来。

英文摘要:

We investigate how to glue hyperconvex (or injective) metric spaces such that the resulting space remains hyperconvex. We give two new criteria, saying that on the one hand gluing along strongly convex subsets and on the other hand gluing along externally hyperconvex subsets leads to hyperconvex spaces. Furthermore, we show by an example that these two cases where gluing works are opposed and cannot be combined.

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