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arXiv 0709.4072math.AGmath.CV
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有理映射诱导的叶理的稳定性

Stability of foliations induced by rational maps

F. Cukierman, J. V. Pereira, I. Vainsencher

摘要:

证明了当$1\le q \le r-2$时,由支配拟齐次有理映射诱导的奇异全纯叶理填充了复射影空间$\mathbb P^r$上余维$q$和度$d$的奇异叶理空间$\mathscr F_q(r, d)$的不可约分支.我们研究这些不可约分量的几何。特别是,我们证明了它们都是有理簇,并计算了它们在几种情况下的投影度。

英文摘要:

We show that the singular holomorphic foliations induced by dominant quasi-homogeneous rational maps fill out irreducible components of the space $\mathscr F_q(r, d)$ of singular foliations of codimension $q$ and degree $d$ on the complex projective space $\mathbb P^r$, when $1\le q \le r-2$. We study the geometry of these irreducible components. In particular we prove that they are all rational varieties and we compute their projective degrees in several cases.

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