Hi Everyone,
I've uploaded a new version of the permutation library to hackage.
Here is the package description:
This library includes data types for storing permutations. It
implements pure and impure types, the latter which can be modified
in-place. The main utility of the library is converting between
the linear representation of a permutation to a sequence of swaps.
This allows, for instance, applying a permutation or its inverse
to an array with O(1) memory use.
.
Much of the interface for the library is based on the permutation
functions in the GNU Scientific Library (GSL).
Here's the url:
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/permutation
Patrick
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