Mathematics – Differential Geometry
Scientific paper
2004-08-10
Geometriae Dedicata 112 (2005) 243--251.
Mathematics
Differential Geometry
8 pages, one figure. Final version, to appear in Geometriae Dedicata
Scientific paper
The tangent bundle to the $n$--dimensional sphere is the space of oriented
lines in $\R^{n+1}$. We characterise the smooth sections of $TS^n\to S^n$ which
correspond to points in $\R^{n+1}$ as gradients of eigenfunctions of the
Laplacian on $S^n$ with eigenvalue $n$. The special case of $n=6$ and its
connection with almost complex geometry is discussed.
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