Abelian.jpg(297 × 393 pixels, file size: 21 KB, MIME type: image/jpeg)

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English: A picture of a van Kampen diagram in a free abelian group of rank two, <a, b
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Author Nsk92
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current15:46, 15 August 2008Thumbnail for version as of 15:46, 15 August 2008297 × 393 (21 KB)Nsk92 (talk | contribs){{Information |Description={{en|1=A picture of a van Kampen diagram in a free abelian group of rank two, <a, b| ab=ba> }} |Source=Own work by uploader |Author=Nsk92 |Date=August 15, 2008 |Permission= |other_versions= }} Intened for use in g

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