作者：Xue; Feng; MAO长度模块水圆锥体连锁数值
摘要：In this paper, we introduce a new numerical invariant complete level for a DG module over a local chain DG algebra and give a characterization of it in terms of ghost length. We also study some of its upper bounds. The cone length of a DG module is an invariant closely related with the invariant level. We discover some important results on it.
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