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On uniformly distributed sequences of integers and Poincaré recurrence III

Published online by Cambridge University Press:  17 April 2009

R. Nair
Affiliation:
Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, United Kingdom
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Abstract

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Let S be a semigroup contained in a locally compact Abelian group G. Let Ĝ denote the Bohr compactification of G. We say that a sequence contained in S is Hartman uniform distributed on G if

for any character χ in Ĝ. Suppose that (Tg)gs is a semigroup of measurable measure preserving transformations of a probability space (X, β, μ) and B is an element of the σ-algebra β of positive μ measure. For a map T: XX and a set AX let T−1A denote {xX: TxA}. In an earlier paper, the author showed that if k is Hartman uniform distributed then

In this paper we show that ≥ cannot be replaced by =. A more detailed discussion of this situation ensues.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2003

References

[1]Nair, R., ‘On uniformly distributed sequences of integers and Poincaré recurrence’, Indag. Math. (N.S.) 9 (1998), 5563.Google Scholar
[2]Nair, R., ‘On Hartman uniform distribution and measures on compact groups’, in Harmonic Analysis and Hypergroups, (Anderson, M., Singh, A.I. and Ross, K., Editors), Trends in Mathematics 3 (Birkhauser, Boston, M.A., 1998), pp. 5975.CrossRefGoogle Scholar
[3]Nair, R., ‘On uniformly distributed sequences of integers and Poincaré recurrence II’, Indag. Math. (N. S.) 9 (1998), 405415.Google Scholar
[4]Nair, R., and Weber, M., ‘On random perturbations of some intersective sets’, Indag. Math. (to appear).Google Scholar