Local rings over which all modules have rational Poincaré series
Local rings over which all modules have rational Poincaré series
复制标题
所有模都具有有理庞加莱级数的局部环
DOI:
10.1016/0022-4049(94)90134-1
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发表时间:
1994
影响因子:
0.8
通讯作者:
L. Avramov
中科院分区:
文献类型:
--
作者:
L. Avramov
If the homotopy Lie algebra π∗(R) of a local ringRcontains a free Lie subalgebra of finite codimension, then for each finitely generatedR-moduleMthe Poincaré seriesPRM(t) = ∑∞n= 0dimkTorRn(M,k)·tnrepresents a rational function int, and there is a least common de nominator for all these functions. When this denominator is a power of (1−t), the ringRis a complete intersection, which has at most one non-quadratic defining equation.