摘要翻译:
设$I_{G}\子集K[x_{1},...,x_{m}]$是与有限图$G$相关联的多环理想。本文研究了两种情况下的二项式算术秩和$I_G$的$G$-齐次算术秩:$G$是二分的,$I_G$是由二次二项式生成的。在这两种情况下,我们证明了二项式算术秩和$g$-算术秩与$i_g$的最小生成元数一致。
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英文标题:
《Arithmetical rank of toric ideals associated to graphs》
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作者:
Anargyros Katsabekis
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最新提交年份:
2009
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分类信息:
一级分类:Mathematics 数学
二级分类:Commutative Algebra 交换代数
分类描述:Commutative rings, modules, ideals, homological algebra, computational aspects, invariant theory, connections to algebraic geometry and combinatorics
交换环,模,理想,同调代数,计算方面,不变理论,与代数几何和组合学的联系
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一级分类:Mathematics 数学
二级分类:Algebraic Geometry 代数几何
分类描述:Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇,叠,束,格式,模空间,复几何,量子上同调
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英文摘要:
Let $I_{G} \subset K[x_{1},...,x_{m}]$ be the toric ideal associated to a finite graph $G$. In this paper we study the binomial arithmetical rank and the $G$-homogeneous arithmetical rank of $I_G$ in 2 cases: $G$ is bipartite, $I_G$ is generated by quadratic binomials. In both cases we prove that the binomial arithmetical rank and the $G$-arithmetical rank coincide with the minimal number of generators of $I_G$.
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PDF链接:
https://arxiv.org/pdf/0812.3097