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refactoring of some lemmas, shorter proofs
[helm.git] / helm / software / matita / dama / ordered_divisible_group.ma
2007-12-04 Enrico Tassirefactoring of some lemmas, shorter proofs
2007-12-04 Enrico Tassisandwitch theorem done
2007-12-04 Enrico Tassisligtly more general results, still to reorganize
2007-12-03 Enrico Tassiok
2007-12-03 Enrico Tassi1 lemma left!!!!