Fri, 09 Dec 1994 16:44:31 +0100 wenzelm minor internal changes;
Fri, 09 Dec 1994 16:42:09 +0100 wenzelm improved axioms_of: returns thms as the manual says;
Fri, 09 Dec 1994 13:39:52 +0100 clasohm removed ZF_Lemmas and added qed_goal
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