arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.4906math.ACmath.AG
收藏

P^1 × P^1中一般点的理想的符号幂与正则幂

Symbolic powers versus regular powers of ideals of general points in P^1 x P^1

Elena Guardo, Brian Harbourne, Adam Van Tuyl

摘要:

最近的工作艾因-拉扎斯菲尔德-史密斯和Hochster-Huneke提出的问题,其中象征权力的理想是包含在一个给定的普通权力的理想。Bocci-Harbourne开发的方法来解决这个问题,其中涉及的理想的符号幂的渐近数值字符。到目前为止,大部分工作都是针对定义射影空间的0维子方案的理想进行的。在这里,我们专注于某些子计划给出了一个联盟的线在${\bf P}^3$也可以被视为点在${\bf P}^1\times {\bf P}^1$。我们还获得了密切相关的问题,研究由Hochster和李斯旺森,确定的情况下,每个象征性的权力的理想是一个普通的权力。

英文摘要:

Recent work of Ein-Lazarsfeld-Smith and Hochster-Huneke raised the problem of which symbolic powers of an ideal are contained in a given ordinary power of the ideal. Bocci-Harbourne developed methods to address this problem, which involve asymptotic numerical characters of symbolic powers of the ideals. Most of the work done up to now has been done for ideals defining 0-dimensional subschemes of projective space. Here we focus on certain subschemes given by a union of lines in ${\bf P}^3$ which can also be viewed as points in ${\bf P}^1\times {\bf P}^1$. We also obtain results on the closely related problem, studied by Hochster and by Li-Swanson, of determining situations for which each symbolic power of an ideal is an ordinary power.

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。

↑