A note on the hyperspace of finite subsets
2021
artykuł naukowy
angielski
- symmetric product
- hyperspace
- sp-network
- stric B0-space
- P-space
- sequentially separable
EN In this paper, we study the relation between a space X satisfying certain generalized metric properties and its hyperspace of finite subsets F(X) satisfying the same properties. We prove that if F(X) is a stric B0-space then so is X. However, there exists a stric B0-space X such that Fn(X) is not a stric B0-space for each n ≥ 2, hence F(X) is not a stric B0-space. Moreover, we prove that X is a P -space (resp., sequentially separable) if and only if so is F(X).
67 - 73
publiczny
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