Ivan, >> This package provides an efficient implementation of so-called >> signed multisets, which generalise multisets by allowing for >> negative membership. >> That is, elements in a signed multiset can have negative multiplicities.
> Wait, something can be not in the multiset more than once? :o That's correct. :) Cheers, Stefan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
