The Tor generator conjecture for Cohen–Macaulay quotients

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Let (R,m)(R,m) be a regular local ring with Krull dimension nn. Suppose I+JI+J is an mm-primary ideal in RR and R/IR/I and R/JR/J are Cohen–Macaulay. The Tor generator conjecture. The module Tor⁡1(R/I,R/J)\operatorname{Tor}_1(R/I,R/J) needs at least ht⁡(I)+ht⁡(J)−n\operatorname{ht}(I)+\operatorname{ht}(J)-n generators. In particular, if II and JJ are two mm-primary ideals, then Tor⁡1(R/I,R/J)\operatorname{Tor}_1(R/I,R/J) needs at least nn generators. This conjecture motivates the study of the minimal number of generators of first Koszul homology over Artinian local rings. The source provides no resolution status.

References

Primary source

Alex Zhongyi Zhang, “The number of generators of the first Koszul homology of an Artinian ring”, arXiv:1411.7096 (2014).

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