Lines Tangent to 2n-2 spheres in R^n

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We show that there are 3 \cdot 2^(n-1) complex common tangent lines to 2n-2 general spheres in R^n and that there is a choice of spheres with all common tangents real.
Minor revisions. Trans. AMer. Math. Soc., to appear. 15 pages, 3 .eps figures; also a web page with computer code verifying the computations in the paper and with additional pictures

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Algebraic Geometry, 14N10, 14P99, 51N20, 52A15, 68U05

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http://salesiana.dossiersoluciones.com/handle/123456789/61511

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0105180
 http://arxiv.org/abs/math/0105180
 Trans. Amer. Math. Soc., 354 (2002), 4815-4829.

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arXiv