Subharmonic variation conjecture for Azukawa pseudometrics of balanced domains

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Let Ω~⊂Cn×Δ\widetilde{\Omega} \subset \mathbb{C}^n \times \Delta be a pseudoconvex domain. For each t∈Δt \in \Delta, define the fiber

Ωt={z∈Cn:(z,t)∈Ω~}.\Omega_t=\{z \in \mathbb{C}^n:(z,t)\in\widetilde{\Omega}\}.

Fix w∈Cnw\in\mathbb{C}^n, and assume that every Ωt\Omega_t is hyperconvex and contains ww. Write At(X):=AΩt,w(X)A_t(X):=A_{\Omega_t,w}(X) for the Azukawa pseudometric of Ωt\Omega_t at ww. For each tt, set

It={X:At(X)<0},I_t=\{X:A_t(X)<0\},

and let V(t)V(t) denote the volume of ItI_t. Subharmonic variation conjecture. The function (X,t)↦At(X)(X,t)\mapsto A_t(X) is plurisubharmonic on Cn×Δ\mathbb{C}^n\times\Delta, and the function

t⟼−log⁡V(t)t\longmapsto-\log V(t)

is subharmonic on Δ\Delta. This is the proposed pluripotential analogue of the subharmonic variation of Robin constants under pseudoconvex domain variations. The conjectural assertions concern both joint plurisubharmonicity of the Azukawa pseudometrics and subharmonicity of the logarithmic volume of their sublevel sets.

References

Primary source

Genki Hosono, “Subharmonic variation of Azukawa pseudometrics for balanced domains”, arXiv:1811.07154 (2018).

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