Conjecture on the dimension of partial Okounkov bodies

From papers

Let XX be the compact complex manifold, let θ\theta be the closed (1,1)(1,1)-form, and let θ\theta-plurisubharmonic function φPSH(X,θ)\varphi\in\operatorname{PSH}(X,\theta) be as above, without assuming that φ\varphi has positive volume. Define the limit partial Okounkov body by

Δ(θ,φ):=ϵQ>0Δ(θ+ϵω,φ).\Delta(\theta,\varphi):=\bigcap_{\epsilon\in\mathbb{Q}_{>0}}\Delta(\theta+\epsilon\omega,\varphi).

Here HH is an ample effective divisor on XX and ωc1(H)\omega\in c_1(H) is a Kähler form. Dimension conjecture. Under these assumptions,

dimΔ(θ,φ)=nd(θ,φ).\dim\Delta(\theta,\varphi)=\operatorname{nd}(\theta,\varphi).

This conjecture predicts that the dimension of the limit partial Okounkov body is exactly the numerical dimension of the singularity type represented by φ\varphi.

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Sources & referencesView supporting material

Primary source

Mingchen Xia, “Partial Okounkov bodies and Duistermaat–Heckman measures of non-Archimedean metrics”, arXiv:2112.04290 (2024).

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