The Stein-Weiss theorem that the distribution function of the Hilbert transform of the characteristic function of E depends only on the measure of E is generalized for the ergodic Hilbert transform in the case of a one-parameter flow of measure-preserving transformations on a σ-finite measure space.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-1-5, author = {Lasha Ephremidze}, title = {The Stein-Weiss theorem for the ergodic Hilbert transform}, journal = {Studia Mathematica}, volume = {162}, year = {2004}, pages = {61-71}, zbl = {1062.28018}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-1-5} }
Lasha Ephremidze. The Stein-Weiss theorem for the ergodic Hilbert transform. Studia Mathematica, Tome 162 (2004) pp. 61-71. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm165-1-5/