src/HOL/Isar_Examples/Schroeder_Bernstein.thy
Mon, 25 Apr 2016 16:09:26 +0200 wenzelm eliminated old 'def';
Sun, 27 Dec 2015 16:20:02 +0100 wenzelm tuned document;
Sun, 27 Dec 2015 16:00:41 +0100 wenzelm more proofs;
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