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Common tangents to spheres in R 3 (2009)
Ciprian Borcea
,
Xavier Goaoc
,
Sylvain Lazard
,
Sylvain Petitjean
,
Loria Inria Lorraine
Abstract
Abstract. We prove that four spheres in R 3 have infinitely many real common tangents if and only if they have aligned centers and at least one real common tangent. 1
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.144.4647
Source
http://www.loria.fr/~lazard/paper/4balls.pdf
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CiteSeerX
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CiteSeerX - Scientific Literature Digital Library and Search Engine (United States)
Type
text
Language
English
Relation
10.1.1.15.8992, 10.1.1.7.3578, 10.1.1.102.3376, 10.1.1.86.7945, 10.1.1.11.1127, 10.1.1.104.4221