src/HOL/Library/Quotient_Type.thy
Wed, 30 Nov 2011 16:27:10 +0100 wenzelm prefer typedef without extra definition and alternative name;
Wed, 10 Feb 2010 19:37:34 +0100 wenzelm renamed Library/Quotient.thy to Library/Quotient_Type.thy to avoid clash with new theory Quotient in Main HOL;
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