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curprev 00:2100:21, 26 March 2025 David Eppstein talk contribs 1,426 bytes −99 Remove unsourced and obviously-untrue claim. The intersection of the family of complements of singletons (each co-null) is the empty set (not co-null). undo Tag: Manual revert

curprev 03:1103:11, 21 March 2025 DotesConks talk contribs 1,525 bytes −194 -> Removed wordpass undo Tags: Reverted Visual edit
curprev 03:0603:06, 21 March 2025 GalStar talk contribs m 1,719 bytes −1 formatting fix undo Tags: Reverted 2017 wikitext editor
curprev 03:0503:05, 21 March 2025 GalStar talk contribs 1,720 bytes +294 Add properties section (blog post added as it is one of few sources) undo Tags: citing a blog or free web host Reverted 2017 wikitext editor

curprev 11:4611:46, 22 November 2008 SmackBot talk contribs m 406 bytes +19 Date maintenance tags and general fixes undo

curprev 00:4600:46, 15 August 2004 Michael Hardy talk contribs 341 bytes +71 "Null" does not mean "empty"; it means having measure zero. Lots of books use that word to mean "empty", so the sentence is potentially very confusing without this extra bit I've added. undo