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diagram of the D4, dihedral group; made by me for wiki
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La bildo estas kopiita de wikipedia:en. La originala priskribo estas: diagram of the D4, dihedral group; made by me for wiki {{GFDL}} {| border="1" ! date/time || username || edit summary |---- | 01:04, 12 December 2004 || en:User:Poccil || <nowiki