Talk:Delta-ring

Is every δ-ring a σ-ring? For a counterexample, search sci.math for "delta-ring" and "sigma-ring" --Keith111 03:15, 11 September 2006 (UTC)

"Consider the family of all finite subsets of some infinite set. This is a delta ring, but not a sigma ring." (from "Questions about delta rings") --Keith111 06:35, 10 October 2006 (UTC)

"A typical example: the sets in R of finite Lebesgue measure." (from "Questions about delta rings") --Keith111 06:57, 10 October 2006 (UTC)