• Title/Summary/Keyword: Hyperhopfian group

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APPROXIMATE FIBRATIONS IN TOPOLOGICAL CATEGORY AND PL CATEGORY

  • Young, Won-Huh;Im, Ho;Woo, Ki-Mun
    • Journal of the Korean Mathematical Society
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    • v.33 no.3
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    • pp.641-650
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    • 1996
  • Let G denote an upper semicontinuous(usc) decomposition of an (n + k)-manifold M into closed, connected n-manifolds. What can be said about the decomposition space B = M/G\ulcorner What regularity properties are possessed by the decomposition map $p : M \to B \ulcorner$ Certain forms of these questions have been addressed by D. Coram and pp. Duvall [C-D].

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