Sat, 01 Sep 2007 18:17:36 +0200 wenzelm mono_Int/Un: proper proof, avoid illegal schematic type vars;
Sat, 01 Sep 2007 16:12:50 +0200 wenzelm removed spurious Toplevel.debug, which actually makes Poly/ML crash in certain situations;
Sat, 01 Sep 2007 15:47:05 +0200 wenzelm added singleton check_typ/term/prop;
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