Sat, 22 Sep 2007 17:45:55 +0200 wenzelm certify: do_expand as explicit argument, actually certify type of abstractions;
Fri, 21 Sep 2007 22:51:13 +0200 wenzelm tuned;
Fri, 21 Sep 2007 22:51:12 +0200 wenzelm added has_abs (from envir.ML);
Fri, 21 Sep 2007 22:51:10 +0200 wenzelm Term.has_abs;
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