Mathematics – Differential Geometry
Scientific paper
2005-12-05
Mathematics
Differential Geometry
43 pages
Scientific paper
We prove that any connected proper Dupin hypersurface in $\R^n$ is analytic algebraic and is an open subset of a connected component of an irreducible algebraic set. We prove the same result for any connected non-proper Dupin hypersurface in $\R^n$ that satisfies a certain finiteness condition. Hence any taut submanifold M in $\R^n$, whose tube $M_\epsilon$ satisfies this finiteness condition, is analytic algebraic and is a connected component of an irreducible algebraic set. In particular, we prove that every taut submanifold of dimension $m \leq 4$ is algebraic.
Cecil Thomas
Chi Quo-Shin
Jensen Gary
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