Depth formula conjecture for squarefree powers of wheel edge ideals

Let Wn\mathcal W_n be the wheel graph on n+1n+1 vertices, let I(Wn)I(\mathcal W_n) be its edge ideal in R=\mathbbk[x1,,xn,v]R=\mathbbk[x_1,\ldots,x_n,v], and let ν(Wn)\nu(\mathcal W_n) denote its matching number. For integers n3n\ge3 and 1qν(Wn)1\le q\le\nu(\mathcal W_n), consider the qq-th squarefree power I(Wn)[q]I(\mathcal W_n)^{[q]}. Depth conjecture for wheel squarefree powers. For all such nn and qq,

depth(R/I(Wn)[q])=2q1,\operatorname{depth}(R/I(\mathcal W_n)^{[q]})=2q-1,

equivalently,

pd(R/I(Wn)[q])=n2q+2.\operatorname{pd}(R/I(\mathcal W_n)^{[q]})=n-2q+2.

The conjecture is suggested by the complete computations reported for wheels with 5n95\le n\le9 in the relevant low-power cases, together with the top-power cases for n=5,,8n=5,\ldots,8. It would give a uniform depth and projective-dimension formula throughout the full range of squarefree powers, beyond the computational evidence currently recorded.

Sources & referencesView supporting material

Primary source

Bilal Ahmad Wani and Uzair Rafiq Shah, “A Join-Matching Theorem for Squarefree Powers of Edge Ideals, with Applications to Wheel and Related Graphs”, arXiv:2607.04964 (2026).

Additional references

3 papers in this index state this conjecture (2026). The statement above is taken from the most recent of them; the others are arXiv:2607.04231, arXiv:2603.02824.

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.