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arXiv 0912.2801math.AGmath.CO
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实radical初始理想

Real radical initial ideals

Cynthia Vinzant

摘要:

我们探讨的后果,一个理想我的真正的多项式有一个真正的激进的初始理想,无论是几何的真正品种的我,并作为一个应用程序的平方和表示的多项式。我们证明了如果in_w(I)是热带簇中向量w的实根,则w在实簇的对数集中.我们还给出了w在更一般的半代数集的对数极限集中的代数充分条件。如果除此之外w的元素都是正数,则相应的二次模是稳定的。特别地,如果in_w(I)是某个正向量w的实根,则模I平方和的集合是稳定的。这提供了一种方法来检查条件的稳定性由权力和Scheiderer。

英文摘要:

We explore the consequences of an ideal I of real polynomials having a real radical initial ideal, both for the geometry of the real variety of I and as an application to sums of squares representations of polynomials. We show that if in_w(I) is real radical for a vector w in the tropical variety, then w is in the logarithmic set of the real variety. We also give algebraic sufficient conditions for w to be in the logarithmic limit set of a more general semialgebraic set. If in addition the entries of w are positive, then the corresponding quadratic module is stable. In particular, if in_w(I) is real radical for some positive vector w then the set of sums of squares modulo I is stable. This provides a method for checking the conditions for stability given by Powers and Scheiderer.

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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