Gromov-Hausdorff Convergence of Constant Scalar Curvature Kähler Metrics near the Canonical Class
Year: 2026
Type: preprint
Abstract: Let $X$ be a compact Kähler manifold with semi-ample canonical bundle. For any Kähler class $[ω]$, Jian--Shi--Song proved that there exists a unique cscK metric in the class $2πc_1(K_X)+\varepsilon[ω]$ when $\varepsilon \in (0,\varepsilon_0]$, using the properness criterion of Chen--Cheng. We prove that the cscK metrics in $2πc_1(K_X)+\varepsilon[ω]$ converge, as $\varepsilon\downarrow0$, in the Gromov--Hausdorff topology to the metric completion of the twisted Kähler-Einstein metric on the canonical model of $X$ as conjectured by Jian--Shi--Song. Based on the technique developed in this paper, we can also give a new proof the theorem of Lee--Tosatti--Zhang on the Gromov-Hausdorff convergence of the normalized Kähler--Ricci flow on $X$.
Source: arXiv (Cornell University)
Authors: Fong, Frederick Tsz-Ho, Liu, Junbang
Institution: Hong Kong University of Science and Technology
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222451010