Systems of quadratic inequalities

Systems of quadratic inequalities
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二次不等式系统

DOI:
10.1112/plms/pds010
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发表时间:
2010
影响因子:
1.8
通讯作者:
Antonio Lerario
Antonio Lerario
中科院分区:
数学1区
文献类型:
--
作者:
A. Agrachev;Antonio Lerario

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我们提出了一个谱序列,它可以有效地计算由一个二次不等式系统定义的一个闭半代数子集的Betti数,以及由这个子集包含在一个二次不等式系统中所引起的同调同态的图像。我们不局限于E2项的谱序列,并给出了一个简单的显式公式的微分d2。
We present a spectral sequence which efficiently computes Betti numbers of a closed semi‐algebraic subset of ℝPn defined by a system of quadratic inequalities and the image of the homology homomorphism induced by the inclusion of this subset in ℝPn. We do not restrict ourselves to the term E2 of the spectral sequence and give a simple explicit formula for the differential d2.