Jonsson–Mustață's equivalent valuation-computing conjecture for subadditive sequences

Let (Oo,m)(\mathcal{O}_o,\mathfrak{m}) be the local ring at oo, let qOo\mathfrak{q}\subset\mathcal{O}_o be a nonzero ideal, and let b\mathfrak{b}_{\bullet} be a subadditive sequence of ideals. Assume that it has controlled growth, meaning

ν(b)ν(bt)t+A(ν)t\nu(\mathfrak{b}_{\bullet})\le\frac{\nu(\mathfrak{b}_t)}{t}+\frac{A(\nu)}{t}

for every t>0t>0 and every quasimonomial valuation ν\nu, and that for some positive integer pp,

mpjbj\mathfrak{m}^{pj}\subset\mathfrak{b}_j

for every jj. Then

lctq(b)=infνA(ν)+ν(q)ν(b).\mathrm{lct}^{\mathfrak{q}}(\mathfrak{b}_{\bullet})=\inf_{\nu}\frac{A(\nu)+\nu(\mathfrak{q})}{\nu(\mathfrak{b}_{\bullet})}.

Jonsson–Mustață's equivalent conjecture. There is a quasimonomial valuation ν\nu on Oo\mathcal{O}_o that computes lctq(b)\mathrm{lct}^{\mathfrak{q}}(\mathfrak{b}_{\bullet}), namely

lctq(b)=A(ν)+ν(q)ν(b).\mathrm{lct}^{\mathfrak{q}}(\mathfrak{b}_{\bullet})=\frac{A(\nu)+\nu(\mathfrak{q})}{\nu(\mathfrak{b}_{\bullet})}.

The source presents this as an equivalent conjecture to the graded-sequence statement and gives no resolution status. It is relevant to the algebraic formulation of the strong openness conjecture and to the existence of valuations computing asymptotic log canonical thresholds.

Sources & referencesView supporting material

Primary source

Shijie Bao, Qi'an Guan and Zheng Yuan, “Zhou valuations and jumping numbers”, arXiv:2311.06565 (2024).

Additional references

3 papers in this index state this conjecture (2011–2023). The statement above is taken from the most recent of them; the others are arXiv:1711.03002, arXiv:1107.2676.

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.