We study the integrability of the supremum of ergodic ratios defined by means of a measure-preserving conservative ergodic transformation of a $\sigma$-finite measure space. Our result implies Ornstein's recent result for the supremum of ergodic averages.
@article{1176996988,
author = {Derriennic, Yves},
title = {On the Integrability of the Supremum of Ergodic Ratios},
journal = {Ann. Probab.},
volume = {1},
number = {5},
year = {1973},
pages = { 338-340},
language = {en},
url = {http://dml.mathdoc.fr/item/1176996988}
}
Derriennic, Yves. On the Integrability of the Supremum of Ergodic Ratios. Ann. Probab., Tome 1 (1973) no. 5, pp. 338-340. http://gdmltest.u-ga.fr/item/1176996988/