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Monotone retracts and some characterizations of dendrites

Authors: G. R. Gordh and Lewis Lum
Journal: Proc. Amer. Math. Soc. 59 (1976), 156-158
MSC: Primary 54F20
MathSciNet review: 0423317
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Abstract: Let $ M$ be a metric continuum containing a fixed point $ p$. The following conditions are shown to be equivalent. (i) $ M$ is a dendrite. (ii) Each subcontinuum of $ M$ is a monotone retract of $ M$. (iii) $ M$ is arcwise connected and each subcontinuum of $ M$ containing $ p$ is a monotone retract of $ M$.

References [Enhancements On Off] (What's this?)

  • [1] G. R. Gordh, Jr., Concerning closed quasi-orders on hereditarily unicoherent continua, Fund. Math. 78 (1973), no. 1, 61-73. MR 48 #1196. MR 0322835 (48:1196)
  • [2] J. G. Hocking and G. S. Young, Topology, Addison-Wesley, Reading, Mass., 1961. MR 23 #A2857. MR 0125557 (23:A2857)
  • [3] Lewis Lum, A characterization of local connectivity in dendroids, Studies in Topology, Academic Press, New York, 1975, pp. 331-338. MR 0358739 (50:11198)
  • [4] -, Order preserving and monotone retracts of a dendroid (submitted).
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Keywords: Continuum, dendrite, tree, monotone retract, hereditary unicoherence at $ p$
Article copyright: © Copyright 1976 American Mathematical Society

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