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Journal Articles Discrete and Computational Geometry Year : 2006

Common Tangents to Spheres in $R3$

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Abstract

We prove that four spheres in $R3$ have infinitely many real common tangents if and only if they have aligned centers and at least one real common tangent.
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Dates and versions

inria-00100261 , version 1 (22-11-2007)

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Ciprian Borcea, Xavier Goaoc, Sylvain Lazard, Sylvain Petitjean. Common Tangents to Spheres in $R3$. Discrete and Computational Geometry, 2006, 35 (2), pp.287-300. ⟨10.1007/s00454-005-1230-y⟩. ⟨inria-00100261⟩
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