Any nonsingular action of the full symmetric group is isomorphic to an action with invariant measure
Nikolay Nessonov
所有作者
Nikolay Nessonov
文献摘要
Let S∞ denote the set of all bijections of
natural numbers. Consider the action of S∞ on a
measure space (X,M,μ), where μ is
S∞-quasi-invariant measure. We prove that there
exists S∞-invariant measure equivalent to μ.