Characterizing metric spaces whose hyperspaces are absolute neighborhood retracts
英文摘要：
We characterize metric spaces $X$ whose hyperspaces $2^X$ or $Bd(X)$ of non-empty closed (bounded) subsets, endowed with the Hausdorff metric, are absolute [neighborhood] retracts.
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。
