arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.05958math.AG
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正特性完全交点上的有理曲线

Rational curves on complete intersections in positive characteristic

Eric Riedl, Matthew Woolf

摘要:

研究了正特征完全交线上的有理曲线的性质。人们早就知道,在特征0,光滑卡-丘和一般类型的品种是不uniruled。然而,在积极的特征中,这一说法有众所周知的反例。然而,我们将证明,射影空间中的\emph{general} Calabi-Yau或一般型完全交不是unirulated。我们还证明了包含有理曲线的$(d_1, \cdots, d_k)$次完全交空间在给定的多重维数的所有完全交的模空间中至少有余维数$\sum_{i=1}^k d_i - 2n + 2$。

英文摘要:

We study properties of rational curves on complete intersections in positive characteristic. It has long been known that in characteristic 0, smooth Calabi-Yau and general type varieties are not uniruled. In positive characteristic, however, there are well-known counterexamples to this statement. We will show that nevertheless, a \emph{general} Calabi-Yau or general type complete intersection in projective space is not uniruled. We will also show that the space of complete intersections of degree $(d_1, \cdots, d_k)$ containing a rational curve has codimension at least $\sum_{i=1}^k d_i - 2n + 2$ in the moduli space of all complete intersections of given multidegree and dimension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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