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arXiv 1003.0824math.ACmath.AG
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关于正特征单项完全交的弱Lefschetz性质的注记

A note on the weak Lefschetz property of monomial complete intersections in positive characteristic

Holger Brenner, Almar Kaid

摘要:

设K是特征p > 0的代数闭域.我们应用C. Han等给出了单式Artin完全交A = K[X,Y,Z]/(X^d,Y^d,Z^d)的弱Lefschetz性质关于d和p的一个显式描述,从而回答了J. Migliore,R. M. Miro-Roig和U. Nagel和等价地刻画了PP^2上秩为2的合丛Syz(X^d,Y^d,Z^d)满足Grauert-Muelich定理的特征。作为推论,我们得到:对p=2,代数A具有弱Lefschetz性质当且仅当对某个正整数t,d=(2^t+1)/3或d=(2^t-1)/3.这是最近由J. Li和F.扎内洛

英文摘要:

Let K be an algebraically closed field of characteristic p > 0. We apply a theorem of C. Han to give an explicit description for the weak Lefschetz property of the monomial Artinian complete intersection A = K[X,Y,Z]/(X^d,Y^d,Z^d) in terms of d and p. This answers a question of J. Migliore, R. M. Miro-Roig and U. Nagel and, equivalently, characterizes for which characteristics the rank-2 syzygy bundle Syz(X^d,Y^d,Z^d) on PP^2 satisfies the Grauert-Muelich theorem. As a corollary we obtain that for p=2 the algebra A has the weak Lefschetz property if and only if d=(2^t+1)/3 or d=(2^t-1)/3 for some positive integer t. This was recently conjectured by J. Li and F. Zanello.

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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