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arXiv 0910.2047math.AGmath.AC
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低阶Hilbert稳定性的Groebner技巧

Groebner techniques for low degree Hilbert stability

Ian Morrison, David Swinarski

摘要:

我们给出了一种通过符号计算来验证相对于具有适当大的自同构群的方案$X \in {\mathbb P}(V)$的Hilbert点的固定(可能是小的)次数$m$的线性化的稳定性或半稳定性的方法。我们还实现了我们的方法,并应用它来分析某些曲线的双正则模型的稳定性。我们的例子非常特殊,但它们自然出现在$\bar{\mathcal M}_g$的对数极小模型程序中。在某些例子中,这种联系提供了对我们计算的检查;在其他例子中,计算证实了关于程序的结构阶段的预测。

英文摘要:

We give a method for verifying, by a symbolic calculation, the stability or semistability with respect to a linearization of fixed, possibly small, degree $m$, of the Hilbert point of a scheme $X \in {\mathbb P}(V)$ having a suitably large automorphism group. We also implement our method and apply it to analyze the stability of bicanonical models of certain curves. Our examples are very special, but they arise naturally in the log minimal model program for $\bar{\mathcal M}_g$. In some examples, this connection provides a check of our computations; in others, the computations confirm predictions about conjectural stages of the program.

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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