Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-25T02:57:13.068Z Has data issue: false hasContentIssue false

Almost periodicity and B-equicontinuity in topological dynamics

Published online by Cambridge University Press:  24 October 2008

Jeong Sheng Yang
Affiliation:
Louisiana State University, New Orleans

Extract

In the previous paper(8), we considered a property of families of functions we termed. ‘B-equicontinuity’. It was shown that B-equicontinuity is stronger than the usual equicontinuity, and is weaker than the equicontinuity defined by Bartle (3). In this paper we consider the concept of B-equicontinuity on topological transformation groups. The net characterization of equicontinuity obtained in (8) is used in discussion. It is proved in (1) that if (X, T, π) is almost periodic, the transition group {πt|tT} is equicontinuous. One might wonder whether this conclusion can be strengthened to say that {πt|tT} is B-equicontinuous; we show here by an example that this is not true and a partial solution to this problem is given. Some relations between almost periodicity and B -equicontinuity are also discussed.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1)Allsbrook, J. and Bagley, R. W.Equicontinuity and A-recursive transformation groups. Proc. Cambridge Philos. Soc. 61 (1965), 333336.CrossRefGoogle Scholar
(2)Bagley, R. W.Introduction to topological dynamics. Lecture notes, Department of Mathematics, Univ. of Alabama, 1962.Google Scholar
(3)Bartle, R. G.On compactness in functional analysis. Trans. Amer. Math. Soc. 79 (1955), 3557.CrossRefGoogle Scholar
(4)Ellis, R.Equicontinuity and almost periodic functions. Proc. Amer. Math. Soc. 9 (1959), 637643.CrossRefGoogle Scholar
(5)Gottschalk, W. H. and Hedlund, G. A.Topological dynamics. American Mathematical Society Colloquium Publ. XXXVI (1955).CrossRefGoogle Scholar
(6)Kelley, J. L.General topology (Van Nostrand; New York: 1955).Google Scholar
(7)Wu, T. S.Left almost periodicity does not imply right almost periodicity. Bull. Amer. Math. Soc. 72 (1966), 314316.CrossRefGoogle Scholar
(8)Yang, J. S. and Bagley, R. W.Equicontinuity in function spaces. Louisiana State University in New Orleans, Department of Mathematics, Technical Report No. 19 (Dec. 1966).Google Scholar