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    * Changed AV* in signatures to SV* plus a cast (SV*) SvRV(array) due
      to problems reported regarding AVPtrs. I copied the trick from the
      Changes of Digest::SHA. (Thanks to Aaron Dalton for reporting the
      problem.)

    * variations() is much better, almost twice as fast and does not
      create SVs

0.07 November 5 2005

    * Documented the corresponding formulas

    * Slicing is done now in Perl. The code is much more clear and in my
      benchmarks no significant difference is measured

    * The iterator now may receive an initial arrayref (this is private
      implementation), which simplifies the set up of the iterator when
      the first tuple is known

0.06 November 5 2005