This paper elucidates the connection between stationary symmetric α-stable processes with 0<α<2 and nonsingular flows on measure spaces by describing a new and unique decomposition of stationary stable processes into those corresponding to positive flows and those corresponding to null flows. We show that necessary and sufficient for a stationary stable process to be ergodic is that its positive component vanishes.
@article{1127395873,
author = {Samorodnitsky, Gennady},
title = {Null flows, positive flows and the structure of stationary symmetric stable processes},
journal = {Ann. Probab.},
volume = {33},
number = {1},
year = {2005},
pages = { 1782-1803},
language = {en},
url = {http://dml.mathdoc.fr/item/1127395873}
}
Samorodnitsky, Gennady. Null flows, positive flows and the structure of stationary symmetric stable processes. Ann. Probab., Tome 33 (2005) no. 1, pp. 1782-1803. http://gdmltest.u-ga.fr/item/1127395873/