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On Irregular Fixed Points

Published online by Cambridge University Press:  20 November 2018

S.K. Kaul*
Affiliation:
University of Calgary
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Throughout this paper (X, d) will be a metric space with metric d, and h a homeomorphism of X onto itself. For any real number r > 0, and p ∊ X, U(p, r) will denote the open r - sphere about p. Any point p ∊ X is called regular [3] if for any given ∊ > 0 there exists a δ > 0 such that d(p, y) <δ implies d(hn(p), hn(y)) < ∊ for all integers n, where hn denotes the iterates of h for n > 0, of h-1 for n < 0, and h0 is the identity. Any point of X which is not a regular point i s called an irregular point. Let I(h) denote the set of all the irregular points of X and R(h) = X-I(h). Lim inf and Lim sup are defined as in [4].

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1967

References

1. Homma, T. and Kinoshita, S., On homeomorphisms which are regular except for a finite number of points. Osaka Math. Jour. 7 (1955), p. 29-38.Google Scholar
2. Kaul, S. K., On almost regular homeomorphisms. To be published in Canadian Journal of Math. Google Scholar
3. Kerèkjártó, B. v., Topologische charakterisierung der linearen Abbildungen. Acta. litt. ac. Sci., Szeged, 6(1933), p. 235-62.Google Scholar
4. Whyburn, G. T., Analytic Topology. Amer. Math. Soc. Coll. Publ, 1942.Google Scholar