Tue, 22 Feb 2005 13:05:47 +0100 paulson removed redundant lemmas and simprules
Tue, 22 Feb 2005 10:54:30 +0100 nipkow more setsum tuning
Mon, 21 Feb 2005 19:23:46 +0100 nipkow more fine tuniung
Mon, 21 Feb 2005 18:04:28 +0100 nipkow fixed proof
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