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Talk:Quadric (projective geometry)

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I don't understand the notation at the bottom of the page. Maybe someone should offer an explanation? Or at least a link to one.--SurrealWarrior (talk) 03:48, 5 June 2008 (UTC)[reply]

Image restoration

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The following image were in this article:

They were removed for copyright reasons, but permission has been supplied, so the images have been restored. Someone can add them back to the article.--SPhilbrick(Talk) 19:23, 19 March 2013 (UTC)[reply]

math notation

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The second form above is standard. Michael Hardy (talk) 18:55, 22 January 2014 (UTC)[reply]