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arXiv 1102.2158math.AC
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稳定完全相交

Stable Complete Intersections

Lorenzo Robbiano, Maria Laura Torrente

摘要:

在n个不定式中的n个多项式的完全交只有有限个零点。在本文中,我们解决以下问题:如何改变零点时,多项式的系数扰动?在第一部分中,我们展示了如何在参数空间中构造半代数集,使得所有完备交理想共享相同数目的孤立实零点。在第二部分中,我们展示了如何修改完整的交集,并得到一个新的,它产生相同的理想,但其真正的零是更稳定的系数扰动。

英文摘要:

A complete intersection of n polynomials in n indeterminates has only a finite number of zeros. In this paper we address the following question: how do the zeros change when the coefficients of the polynomials are perturbed? In the first part we show how to construct semi-algebraic sets in the parameter space over which all the complete intersection ideals share the same number of isolated real zeros. In the second part we show how to modify the complete intersection and get a new one which generates the same ideal but whose real zeros are more stable with respect to perturbations of the coefficients.

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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