Coincidence conjecture for squarefree strongly stable ideals

Let S=K[x1,,xn]S=\mathbb{K}[x_1,\dots,x_n], and let ISI\subset S be a squarefree strongly stable ideal generated by monomials of degree dd. Let IτI^\tau be the monomial ideal obtained from II by the stated squarefree-to-ordinary polarization correspondence. Coincidence conjecture. The following seven numbers coincide:

sdepthn(I),hdepthn(I),hdepth1(I),sdepthn(Iτ),hdepthn(Iτ),hdepth1(Iτ),H(Iτ,d+1)H(Iτ,d).\operatorname{sdepth}_n(I),\quad \operatorname{hdepth}_n(I),\quad \operatorname{hdepth}_1(I),\quad \operatorname{sdepth}_n(I^\tau),\quad \operatorname{hdepth}_n(I^\tau),\quad \operatorname{hdepth}_1(I^\tau),\quad \left\lfloor\frac{H(I^\tau,d+1)}{H(I^\tau,d)}\right\rfloor.

This conjecture would unify Stanley depth and Hilbert depth under the squarefree correspondence and reduce these invariants to a Hilbert-function calculation. The supplied text gives no resolution evidence.

Sources & referencesView supporting material

Primary source

Yi-Huang Shen, “Lexsegment ideals of Hilbert depth 1”, arXiv:1208.1822 (2012).

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