On extremal and perfect σ-algebras for flows
Tom 129 / 1998
Studia Mathematica 129 (1998), 179-183
DOI: 10.4064/sm-129-2-179-183
Streszczenie
It is shown that there exists a flow on a Lebesgue space with finite entropy and an extremal σ-algebra of it which is not perfect.
