Syzygies and Homological Conjectures

Syzygies and Homological Conjectures
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Syzygies 和同调猜想

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发表时间:
1989
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通讯作者:
S. Dutta
S. Dutta
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作者:
S. Dutta

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在整个工作中,(A, m, k) 表示维度为 d 的交换诺特局部环,m 是 A 的最大理想,k = A/m。本文的主要目的是从syzygies的角度研究M. Hochster的正则元素猜想。该猜想可以表述如下: 猜想。对于每个分辨率 F: $$ o {A^{{s_i}}} o {A^{{s_i} - 1}} o cdotcdotcdot o {A^{{s_0}}} o k o 0$$ k 和 A 的每个参数 x1,…, x d 系统,如果 φ 是从 Koszul 复数 K*(x; A)(x 代表 x1,…, xd)到 F 的任意映射,该映射提升了自然满射 ({A mathord{left/ {vphantom {A {left( {{x_1}, ldots ,{x_n}}) 右) ok,,然后,{phi _n},:,{K_n}左( {underset{ aise0.3emhbox{$smash{scriptscriptstyle-}$}}{x} ;A} 右)}}} 对了。克恩- ulldelimiterspace} {left( {{x_1}, ldots ,{x_n}} 右) ok,,然后,{phi _n},:,{K_n}左( {underset{ aise0.3emhbox{$smash{scriptscriptstyle-}$}}{x} ;A} ight)}} o {A^{{s_n}}}) 为非零。
Throughout this work (A, m, k) denotes a commutative Noetherian local ring of dimension d, m is the maximal ideal of A and k = A/m. The main purpose of this paper is to study the canonical element conjecture of M. Hochster from the point of view of syzygies. The conjecture can be stated as follows: Conjecture. For every resolution F: $$ o {A^{{s_i}}} o {A^{{s_i} - 1}} o cdotcdotcdot o {A^{{s_0}}} o k o 0$$ of k and for every system of parameters x1,…, x d of A, if φ is any map from the Koszul complex K*(x; A) (x stands for x1,…, xd)to F which lifts the natural surjection ({A mathord{left/ {vphantom {A {left( {{x_1}, ldots ,{x_n}} ight) o k,,then,{phi _n},:,{K_n}left( {underset{ aise0.3emhbox{$smash{scriptscriptstyle-}$}}{x} ;A} ight)}}} ight. kern- ulldelimiterspace} {left( {{x_1}, ldots ,{x_n}} ight) o k,,then,{phi _n},:,{K_n}left( {underset{ aise0.3emhbox{$smash{scriptscriptstyle-}$}}{x} ;A} ight)}} o {A^{{s_n}}}) is non-zero.