We show that a dissipative, ergodic measure preserving transformation of a σ-finite, non-atomic measure space always has many non-proportional, absolutely continuous, invariant measures and is ergodic with respect to each one of these.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm110-1-7, author = {Jon Aaronson and Tom Meyerovitch}, title = {Absolutely continuous, invariant measures for dissipative, ergodic transformations}, journal = {Colloquium Mathematicae}, volume = {111}, year = {2008}, pages = {193-199}, zbl = {1142.37002}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm110-1-7} }
Jon Aaronson; Tom Meyerovitch. Absolutely continuous, invariant measures for dissipative, ergodic transformations. Colloquium Mathematicae, Tome 111 (2008) pp. 193-199. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm110-1-7/