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Talk:Σ-algebra

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This is an old revision of this page, as edited by Angela (talk | contribs) at 02:49, 22 October 2004 (rm '== Headline text =='). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Is exist a infinite sigma algebra on an set X such that be countable?

No, any sigma-algebra is either finite or uncountable. Prumpf 13:14, 12 Oct 2004 (UTC)
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