Abstract
We prove that there are at most eight lines tangent to four unit spheres in ℝ3 if the centres of the spheres are coplanar, but not collinear. This bound is sharp.
Original language | English |
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Pages (from-to) | 493-497 |
Number of pages | 4 |
Journal | Discrete & Computational Geometry |
Volume | 26 |
Issue number | 4 |
Publication status | Published - Dec 2001 |