Equality of divisorial and K-stability thresholds

Let (X,B;L)(X,B;L) be a polarized pair, and let σdiv(X,B;L)\sigma_{\mathrm{div}}(X,B;L) and σK(X,B;L)\sigma_{\mathrm{K}}(X,B;L) denote the divisorial and K-stability thresholds, respectively. Threshold equality conjecture. For any polarized pair (X,B;L)(X,B;L),

σdiv(X,B;L)=σK(X,B;L).\sigma_{\mathrm{div}}(X,B;L)=\sigma_{\mathrm{K}}(X,B;L).

In particular, (X,B;L)(X,B;L) is divisorially semistable (resp. divisorially stable) if and only if it is K-semistable (resp. uniformly K-stable). The semistability and stability equivalence is known in the log Fano case; in the smooth complex case with B=0B=0, the conjecture would give the uniform Yau--Tian--Donaldson equivalence.

Sources & referencesView supporting material

Primary source

Sebastien Boucksom and Mattias Jonsson, “A non-Archimedean approach to K-stability, II: divisorial stability and openness”, arXiv:2206.09492 (2023).

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