Mon, 01 Feb 2010 22:46:12 +0100 wenzelm more details on long names, binding/naming, name space;
Sun, 31 Jan 2010 22:08:25 +0100 wenzelm Variable.names_of;
Sun, 31 Jan 2010 21:40:44 +0100 wenzelm more details on Isabelle symbols;
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