Thu, 25 May 2000 15:14:20 +0200 paulson better indentation; declared function "null"
Thu, 25 May 2000 15:13:57 +0200 paulson new default rules
Thu, 25 May 2000 15:12:40 +0200 paulson deleted sum_below: no need for it with setsum and lessThan
Thu, 25 May 2000 15:12:00 +0200 paulson documented permute_prems
Thu, 25 May 2000 15:11:32 +0200 paulson better indentation
Thu, 25 May 2000 15:10:57 +0200 paulson overloading of 0
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