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JOURNALS // Zhurnal Matematicheskoi Fiziki, Analiza, Geometrii [Journal of Mathematical Physics, Analysis, Geometry] // Archive

Mat. Fiz. Anal. Geom., 2000 Volume 7, Number 1, Pages 35–48 (Mi jmag392)

This article is cited in 5 papers

Point realization of Boolean actions of countable inductive limits of locally compact groups

Alexandre I. Danilenko

Department of Mathematics and Mechanics, Kharkov National University, 4 Svobody Sq., Kharkov, 61077, Ukraine

Abstract: Let $G$ be a CILLC-group, i.e., the inductive limit of an increasing sequence of its closed locally compact subgroups. Every nonsingular action of $G$ on a measure space $(X,\mathcal B,\mu)$ generates a continuous action of $G$ on the underlying Boolean $\sigma$-algebra $\mathcal M[\mu]=\mathcal B/I_\mu$, where $I_\mu$ is the ideal of $\mu$-null subsets. It is known that the converse is true for any locally compact $G$: every abstract Boolean $G$-space is associated with some Borel nonsingular action of $G$. In the present work this assertion is generalized to arbitrary CILLC-groups. In addition, we conctruct a free measure preserving action of $G$ on a standard probability space.

MSC: Primary 28D15; Secondary 46L55

Language: English



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