If $(u_n)$ is a sequence of real numbers which is good for the ergodic theorem, is the sequence of the integer parts $([u_n])$ good for the ergodic theorem\,? The answer is negative for the mean ergodic theorem and affirmative for the pointwise ergodic theorem.
@article{118801,
author = {Emmanuel Lesigne},
title = {On the sequence of integer parts of a good sequence for the ergodic theorem},
journal = {Commentationes Mathematicae Universitatis Carolinae},
volume = {36},
year = {1995},
pages = {737-743},
zbl = {0868.28010},
mrnumber = {1378695},
language = {en},
url = {http://dml.mathdoc.fr/item/118801}
}
Lesigne, Emmanuel. On the sequence of integer parts of a good sequence for the ergodic theorem. Commentationes Mathematicae Universitatis Carolinae, Tome 36 (1995) pp. 737-743. http://gdmltest.u-ga.fr/item/118801/
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