Talk:Descartes' theorem

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Disambiguation

I can't help wondering of Descartes' theorem should be a disambiguation page? Thoughts? Michael Hardy 22:35, 23 May 2005 (UTC)[reply]

Curvature

Is "curvature" the right term for ±1/r? I've seen explanations with curvature as always positive, 1/r, and "bend" used for the positive or negative curvature. Daggerbox (talk) 14:29, 13 February 2008 (UTC)[reply]

Organization

This article takes entirely too long before it states even the gist of Descartes' Theorem. Ideally, at least the gist should appear in the lede, and the full statement should have been given by the next section (if not within the lede). A reader should not, for example, have first to read of the history of the theorem. —SlamDiego_←T 03:26, 2 November 2008 (UTC)[reply]

Equations for spheres too?

The article mentions how the theorem has been extended to spheres and even arbitrary dimension hyperspheres. Is it possible anyone can add the equations for either of those? Even just 3D spheres for now would be nice.