On group extensions of 2-fold simple ergodic actions
Tom 110 / 1994
Studia Mathematica 110 (1994), 53-64 DOI: 10.4064/sm-110-1-53-64
Compact group extensions of 2-fold simple actions of locally compact second countable amenable groups are considered. It is shown what the elements of the centralizer of such a system look like. It is also proved that each factor of such a system is determined by a compact subgroup in the centralizer of a normal factor.