Thu, 24 Aug 2000 12:39:24 +0200 paulson xsymbols for leads-to and Join
Thu, 24 Aug 2000 11:14:21 +0200 paulson fixed strip_assums and assum_pairs, restoring them (essentially) to their
Thu, 24 Aug 2000 11:05:20 +0200 paulson added some xsymbols, and tidied
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