Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-27T18:12:04.098Z Has data issue: false hasContentIssue false

Hopf's Ergodic Theorem for Particles with Different Velocities and the "Strong Sweeping out Property"

Published online by Cambridge University Press:  20 November 2018

A. Bellow
Affiliation:
Department of Mathematics, Northwestern University Evanston, Illinois 60208 U.S.A.
A. P. Calderón
Affiliation:
Department of Mathematics, University of Chicago Chicago, Illinois 60637 U.S.A.
Rights & Permissions [Opens in a new window]

Abstract

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.

In an earlier paper we provided a counterexample to an old conjecture of Hopf. In this note we show that the "strong sweeping out property" obtains for the Hopf operators (Tt) both when t —> +∞ and when t —> 0+, that is a.e. convergence fails in the worst possible way.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1995

References

1. Bellow, A. and Krengel, U., On Hopf's Ergodic Theorem for particles with different velocities, Almost Everywhere Convergence II, Academic Press, 1991, (eds. A. Bellow and R. Jones), 4147.Google Scholar
2. de Guzman, M., Real Variable Methods in Fourier Analysis, North-Holland Math. Stud. 46, 1981.Google Scholar
3. Hopf, E., Über die Bedeutung der willkürlichen Funktionen für die Wahrscheinlichkeitstheorie, Jahresber. Deutsch. Math.-Verein. 46(1936), 179195.Google Scholar
4. del, A. Junco and Rosenblatt, J., Counterexamples in Ergodic Theory and Number Theory, Math. Ann. 245(1979), 185197.Google Scholar
5. Krengel, U., Ergodic Theorems, de Gruyter Stud. Math. 6, 1985.Google Scholar