NAME
   Algorithm::EquivalenceSets - Group sets transitively

VERSION
   version 1.101420

SYNOPSIS
       use Algorithm::EquivalenceSets;

       my @sets = (
           [ 'a', 1, 2 ],
           [ 'b', 3, 4 ],
           [ 'c', 5    ],
           [ 'd', 1, 6 ],
           [ 'e', 3, 6 ],
           [ 'f', 5, 7 ],
       );

       my @equiv_sets = equivalence_sets(@sets);

       # @equiv_sets is ([ qw(c f 5 7) ], [ qw(a b d e 1 2 3 4 6) ])

DESCRIPTION
   This module exports one function, "equivalence_sets()", which takes a
   list of sets and returns another list of sets whose contents are
   transitively grouped from the input sets.

   Imagine the input sets to be "[ 1, 2 ]", "[ 3, 4 ]", "[ 5, 6 ]" and "[
   1, 3, 7 ]". The returned sets would be "[ 1, 2, 3, 4, 7 ]" and "[ 5, 6
   ]", because "[ 1, 2 ]" and "[ 3, 4 ]" are tied together by "[ 1, 3, 7
   ]", but "[ 5, 6 ]" stands on its own. So you could say the returned sets
   represent a kind of transitive union. (Real mathematicians may now flame
   me about the misuse of terminology.)

   Each set is an array reference. The return sets are given as an array in
   list context, or as a reference to that array in scalar context.

METHODS
 equivalence_sets
   FIXME

INSTALLATION
   See perlmodinstall for information and options on installing Perl
   modules.

BUGS AND LIMITATIONS
   No bugs have been reported.

   Please report any bugs or feature requests through the web interface at
   <http://rt.cpan.org/Public/Dist/Display.html?Name=Algorithm-EquivalenceS
   ets>.

AVAILABILITY
   The latest version of this module is available from the Comprehensive
   Perl Archive Network (CPAN). Visit <http://www.perl.com/CPAN/> to find a
   CPAN site near you, or see
   <http://search.cpan.org/dist/Algorithm-EquivalenceSets/>.

   The development version lives at
   <http://github.com/hanekomu/Algorithm-EquivalenceSets/>. Instead of
   sending patches, please fork this project using the standard git and
   github infrastructure.

AUTHOR
     Marcel Gruenauer <[email protected]>

COPYRIGHT AND LICENSE
   This software is copyright (c) 2007 by Marcel Gruenauer.

   This is free software; you can redistribute it and/or modify it under
   the same terms as the Perl 5 programming language system itself.