Sat, 31 Aug 2013 22:18:51 +0200 wenzelm tuned proofs;
Sat, 31 Aug 2013 18:12:51 +0200 wenzelm tuned proofs;
Sat, 31 Aug 2013 13:34:39 +0200 wenzelm provide ISABELLE_JAVA_SYSTEM_OPTIONS via settings;
Sat, 31 Aug 2013 13:20:18 +0200 wenzelm uniform abbrevs for left/right arrows;
Sat, 31 Aug 2013 13:05:04 +0200 wenzelm more abbrevs according to Isabelle/HOL ASCII replacement syntax;
Sat, 31 Aug 2013 12:53:39 +0200 wenzelm added common alternative for == (its ambiguity also avoids conflict with ==>);
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