src/HOL/Library/Indicator_Function.thy
Tue, 29 Dec 2015 23:04:53 +0100 wenzelm more symbols;
Mon, 28 Dec 2015 19:23:15 +0100 wenzelm more symbols;
Wed, 11 Nov 2015 10:13:40 +0100 Andreas Lochbihler add lemmas
less more (0) -10 -3 tip