High Quality Content by WIKIPEDIA articles In mathematics, the Klein four-group (or just Klein group or Vierergruppe (English: four-group), often symbolized by the letter V) is the group Z2 Z2, the direct product of two copies of the cyclic group of order 2. It was named Vierergruppe by Felix Klein in his Vorlesungen ber das Ikosaeder und die Aufl sung der Gleichungen vom f nften Grade in 1884.
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