A note on the subadditivity of Syzygies

A note on the subadditivity of Syzygies
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关于 Syzygies 次可加性的注解

DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
H. Srinivasan
H. Srinivasan
中科院分区:
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作者:
Sabine El Khoury;H. Srinivasan

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设R=S/I是一个分次代数,$ti $和$Ti $分别是R在i$上的最小S$分解的最小和最大移位.本文证明了对于所有n$,$t_n\leq t_1+T_{n-1}$,并由此证明了对于余维h$的Gorenstein代数,最小分解中的最大移位$T_i$的次可加性对i \geq h-1$成立,即对i\geq h-1$,$T_i \leq T_a+T_{i-a}$成立.
Let $R=S/I$ be a graded algebra with $t_i$ and $T_i$ being the minimal and maximal shifts in the minimal $S$ resolution of $R$ at degree $i$. In this paper we prove that $t_n\leq t_1+T_{n-1}$, for all $n$ and as a consequence, we show that for Gorenstein algebras of codimension $h$, the subadditivity of maximal shifts $T_i$ in the minimal resolution holds for $i \geq h-1$, i.e, we show that $T_i \leq T_a+T_{i-a}$ for $i\geq h-1$.
Koszul 代数合子的次可加性
DOI: 10.1007/s00208-014-1060-4
发表时间: 2015
影响因子: 1.4
作者:
Avramov, Luchezar L.;Conca, Aldo;Iyengar, Srikanth B.
通讯作者: Iyengar, Srikanth B.