Abstract
In this paper, we characterize a set of indices τ={τ(0)<τ(1)<…} such that forany normal sequence (α(0), α(1),…) of a certain type, the subsequence (α(τ(0)), α(τ(1)),…) is a normal sequence of the same type. Assume thatn→∞. Then, we prove that τ has this property if and only if the 0–1 sequence (θ τ (0), whereθ τ (i)=1 or 0 according asi∈{τ(j);j=0, 1,…} or not, iscompletely deterministic in the sense of B. Weiss.
Similar content being viewed by others
References
L. M. Abramov,The entropy of the derived automorphism, Dokl. Akad. Nauk. SSSR128 (1959), 647–650.
P. Billingsley,Ergodic Theory and Information, John Wiley and Sons, New York, 1965.
H. Furstenberg,Disjointness in ergodic theory, minimal sets, and a problem in Diophantine approximation, Math. Systems Theory 1–1 (1967), 1–49.
W. H. Gottschalk,Substitution minimal sets, Trans. Amer. Math. Soc.109 (1963), 467–491.
K. Jacobs and M. Keane,0–1 Sequences of Toeplitz type, Z. Wahrscheinlichkeitstheorie Verw. Gebiete13 (1969), 123–131.
Teturo Kamae,Spectrum of a substitution minimal set, J. Math. Soc. Japan22 (1970), 567–578.
Teturo Kamae,A topological invariant of substitution minimal sets, J. Math. Soc. Japan24 (1972), 285–306.
M. Keane,Generalized Morse sequences, Z. Wahrscheinlichkeitstheorie Verw. Gebiete10 (1968), 335–353.
J. C. Oxtoby,Ergodic sets, Bull. Amer. Math. Soc.58 (1961), 116–136.
J. C. Oxtoby,On two theorems of Parthasarathy and Kakutani concerning the shift transformation, Ergodic Theory, Fred B. Wright (ed.), Academic Press, New York, 1962.
K. R. Parthasarathy,Probability Measures on Metric Spaces, Academic Press, New York, 1967.
V. A. Rokhlin,New progress in the theory of transformations with invariant measure, Russian Math. Surveys15 (1960), 1–22.
H. Totoki,Introduction to Ergodic Theory, Kyoritsu Shuppan, Tokyo, 1971 (in Japanese).
B. Weiss,Normal sequences as collectives, Proc. Symp. on Topological Dynamics and Ergodic Theory, Univ. of Kentucky, 1971.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kamae, T. Subsequences of normal sequences. Israel J. Math. 16, 121–149 (1973). https://doi.org/10.1007/BF02757864
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02757864