Tue, 08 Sep 1998 17:03:21 +0200 oheimb improved spacing
Tue, 08 Sep 1998 16:06:04 +0200 oheimb adapted modifiers: Mod1 -> Mod2, Mod5 -> Mod4
Tue, 08 Sep 1998 15:17:11 +0200 paulson Got rid of not_Says_to_self and most uses of ~= in definitions and theorems
Tue, 08 Sep 1998 14:54:21 +0200 paulson Got rid of not_Says_to_self; re-organized proofs
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