Mon, 19 Oct 1998 13:50:25 +0200 oheimb layout
Mon, 19 Oct 1998 13:34:19 +0200 mueller solved conflict by taking newest version;
Mon, 19 Oct 1998 11:26:46 +0200 paulson added Clarify_tac to speed up proofs
Mon, 19 Oct 1998 11:25:37 +0200 paulson moved a theorem
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