Wed, 08 Oct 1997 12:15:59 +0200 wenzelm symbols syntax;
Wed, 08 Oct 1997 11:50:33 +0200 wenzelm A formalization of TLA in HOL -- by Stephan Merz;
Tue, 07 Oct 1997 18:02:42 +0200 wenzelm improved types of add_XXX funs (xtyp etc.);
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