src/ZF/Nat_ZF.thy
Tue, 06 Mar 2012 16:06:52 +0000 paulson Using mathematical notation for <-> and cardinal arithmetic
Tue, 06 Mar 2012 15:15:49 +0000 paulson mathematical symbols instead of ASCII
Sun, 20 Nov 2011 20:15:02 +0100 wenzelm eliminated obsolete "standard";
Sat, 17 Oct 2009 14:43:18 +0200 wenzelm eliminated hard tabulators, guessing at each author's individual tab-width;
Mon, 11 Feb 2008 15:40:21 +0100 krauss Made theory names in ZF disjoint from HOL theory names to allow loading both developments
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