Stronger variable reduction conjecture for monomial ideals with linear quotients

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Let KK be a field, let S=K[x1,x2,…,xn]S=K[x_1,x_2,\ldots,x_n], let I⊂SI\subset S be a proper monomial ideal with linear quotients, and write [n]=1,…,n[n]=\\{1,\ldots,n\\}. The stronger variable reduction conjecture. There exists i∈[n]i\in[n] such that

depth⁡(S/(I,xi))≥depth⁡(S/I)\operatorname{depth}(S/(I,x_i))\geq\operatorname{depth}(S/I)

and

sdepth⁡(S/(I,xi))≤sdepth⁡(S/I).\operatorname{sdepth}(S/(I,x_i))\leq\operatorname{sdepth}(S/I).

This strengthens the preceding depth-preserving variable conjecture by adding a Stanley-depth inequality; the source gives no resolution.

References

Primary source

Andreea I. Bordianu and Mircea Cimpoeas, “Remarks on the Stanley depth and Hilbert depth of monomial ideals with linear quotients”, arXiv:2102.07196 (2024).

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