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arxiv: 1408.7020 · v1 · pith:YMWMK53Xnew · submitted 2014-08-29 · 🧮 math.AG · math.CV· math.DS

Higher codimensional foliations and Kupka singularities

classification 🧮 math.AG math.CVmath.DS
keywords kupkamathcaltransversaltypecodimensioncompletecomponentconclusion
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We consider holomorphic foliations of dimension $k>1$ and codimension $\geq 1$ in the projective space $\mathbb{P}^n$, with a compact connected component of the Kupka set. We prove that, if the transversal type is linear with positive integers eigenvalues, then the foliation consist on the fibers of a rational fibration. As a corollary, if $\mathcal{F}$ is a foliation such that $dim(\mathcal{F})\geq cod(\mathcal{F})+2$ and has transversal type diagonal with different eigenvalues, then the Kupka component $K$ is a complete intersection and we get the same conclusion. The same conclusion holds if the Kupka set is a complete intersection and has radial transversal type. Finally, as an application, we find a normal form for non integrable codimension one distributions on $\mathbb{P}^{n}$.

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