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K-Coherence is Cyclicly Extensible and Reducible

Published online by Cambridge University Press:  20 November 2018

B. Lehman*
Affiliation:
University of Giielph, Guelph, Ontario
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K-coherence (K an integer ≧ –1), has been defined by W. R. R. Transue [3] in such a way that 0-coherence is connectedness and 1-coherence is unicoherence plus local connectedness. It is well-known (see, for instance, [5, p. 82]), that for metric spaces, unicoherence is cyclicly extensible and reducible; furthermore, this result has been generalized by Minear to locally connected spaces, [2, Theorems 4.1 and 4.3]. In this paper we show that for a (k – 1)-coherent and locally (k – 1)-coherent Hausdorff space M,k-coherence is cyclicly extensible and reducible.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1980

References

1. Lehman, B., Cyclic element theory in connected and locally connected Hausdorff spaces, Can. J. Math. 28 (1976), 10321050.Google Scholar
2. Minear, S. E., On the structure of locally connected topological spaces, Thesis, Montana State University (1971).Google Scholar
3. Transue, Y. R. R., On a definition of connectedness in dimension n, Thesis, University of Georgia (1967).Google Scholar
4. Vietoris, L., Über den Höheren Zusammenhang von Vereinigungsmengen und Durchschnitter, Fund. Math. 19 (1932), 265273.Google Scholar
5. Whyburn, G. T., Analytic topology, Amer. Math. Soc. Colloq. Publ. 28 (1942).Google Scholar
6. Whyburn, G. T., Cut points in general topological spaces, Proc. Nat. Acad. Sci. 61 (1968), 380387.Google Scholar