Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-19T11:10:13.340Z Has data issue: false hasContentIssue false

A Pointwise Ergodic Theorem in Lp-Spaces

Published online by Cambridge University Press:  20 November 2018

M. A. Akcoglu*
Affiliation:
University of Toronto, Toronto, Ontario
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Let be a measure space and the usual Banach spaces. A linear operator T : LpLpis called a positive contraction if it transforms non-negative functions into non-negative functions and if its norm is not more than one. The purpose of this note is to show that if 1 < p < ∞ and if T : LpLp is a positive contraction then

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1975

References

1. Akcoglu, M. A. and Sucheston, L., On the dominated ergodic theorem in L-2 space (to appear in Froc. Amer. Math. Soc).Google Scholar
2. Burkholder, D. L., Semi-Gaussian subspaces, Trans. Amer. Math. Soc. 104 (1902), 123131.Google Scholar
3. Chacon, R. V. and Olsen, J., Dominated estimates of positive contractions, Proc. Amer. Math. Soc. 20 (1969), 266271.Google Scholar
4. Chacon, R. V. and McGrath, S. A., Estimates of positive contractions, Pacific J. Math. 30 (1969), 609620.Google Scholar
5. Ionescu-Tulcea, A., Ergodic properties of isometries in Lp-spaces, Bull. Amer. Math. Soc. 70 (1964), 366371.Google Scholar
6. Stein, E. M., On the maximal ergodic theorem, Proc. Nat. Acad. Sci. U.S.A. J,7 (1961), 18941897.Google Scholar