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The structure of Whitney blocks

机译:惠特尼积木的结构

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Let X be a metric continuum and C(X) the hyperspace of subcontinua of X. A Whitney block is a set of the form mu(-1)([s,t]), where mu : C(X) -> [0, 1] is a Whitney map and 0 <= s < t < 1. In this paper we study continua for which Whitney blocks are homeomorphic to X x [0, 1]. We characterize an arc, a simple closed curve and simple n-ods in terms of Whitney blocks. We also show that if X is arc-like, then each Whitney block for C(X) is 2-cell-like; and if X is circle-like, then each Whitney block of the form mu(-1)([0, t]) is ring-like. (C) 2016 Elsevier B.V. All rights reserved.
机译:令X为度量连续体,C(X)为X子连续体的超空间。惠特尼块是一组形式为mu(-1)([s,t]),其中mu:C(X)-> [ 0,1]是惠特尼映射,0 <= s

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