An atomic theory of ergodic spaces
R. Caballero, A. de la Torre (1985)
Studia Mathematica
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R. Caballero, A. de la Torre (1985)
Studia Mathematica
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Jon Aaronson, Benjamin Weiss (2000)
Colloquium Mathematicae
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We prove a generalised tightness theorem for cocycles over an ergodic probability preserving transformation with values in Polish topological groups. We also show that subsequence tightness of cocycles over a mixing probability preserving transformation implies tightness. An example shows that this latter result may fail for cocycles over a mildly mixing probability preserving transformation.
Ryotaro Sato (1987)
Studia Mathematica
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F. J. Martin-Reyes (1986)
Annales de l'I.H.P. Probabilités et statistiques
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F. Martín-Reyes, P. Ortega Salvador (1988)
Studia Mathematica
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Ryotaro Sato (1988)
Studia Mathematica
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Ryotaro Sato (1973)
Studia Mathematica
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A. de la Torre, F. Martín-Reyes (1987)
Studia Mathematica
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Yves Derriennic (2000)
Colloquium Mathematicae
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For a Cesàro bounded operator in a Hilbert space or a reflexive Banach space the mean ergodic theorem does not hold in general. We give an additional geometrical assumption which is sufficient to imply the validity of that theorem. Our result yields the mean ergodic theorem for positive Cesàro bounded operators in (1 < p < ∞). We do not use the tauberian theorem of Hardy and Littlewood, which was the main tool of previous authors. Some new examples, interesting for summability...