Sun, 22 Oct 1995 15:16:57 +0100 nipkow Improved a few proofs.
Thu, 19 Oct 1995 13:25:03 +0100 clasohm corrected spelling of title (to test new CVS loginfo)
Tue, 17 Oct 1995 17:59:47 +0100 regensbu *** empty log message ***
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