Wed, 07 Apr 2010 23:39:08 -0700 Brian Huffman polish explanation of additive group syntax
Thu, 08 Apr 2010 08:40:49 +0200 Christian Urban final version of the pearl paper
Wed, 07 Apr 2010 22:08:46 +0200 Christian Urban my final version of the paper
Wed, 07 Apr 2010 17:37:29 +0200 Christian Urban added an induction principle for permutations; removed add_perm construction
Tue, 06 Apr 2010 23:33:40 +0200 Christian Urban isarfied proof about existence of a permutation list
Tue, 06 Apr 2010 14:08:06 +0200 Christian Urban added reference to E. Gunter's work
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