Homeomorphism conjecture for the generalized Kähler–Einstein metric space

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Let XX be an nn-dimensional Kähler manifold with semi-ample canonical line bundle KXK_X. For sufficiently large ℓ\ell, let π:X→Xcan⊂CPN\pi:X\rightarrow X_{can}\subset\mathbb{C}P^N be the holomorphic Calabi–Yau fibration onto its canonical model, and let SS be the set of singular values. Let ωGKE⁡\omega_{\operatorname{GKE}} be the generalized Kähler–Einstein current, let dGKE⁡d_{\operatorname{GKE}} be its induced length metric on Xcan\SX_{can}\backslash S, and define XGKE⁡X_{\operatorname{GKE}} as the metric completion of (Xcan\S,dGKE⁡)(X_{can}\backslash S,d_{\operatorname{GKE}}). Homeomorphism conjecture. XGKE⁡X_{\operatorname{GKE}} is homeomorphic to XcanX_{can}; in particular, (XGKE⁡,dGKE⁡)(X_{\operatorname{GKE}},d_{\operatorname{GKE}}) is a compact metric space. This is proved for smooth minimal models of general type and when the Kodaira dimension is 11, with further results for Kähler surfaces; the general case remains open.

References

Primary source

Gang Tian and Zhenlei Zhang, “Relative volume comparison of Ricci Flow and its applications”, arXiv:1802.09506 (2018).

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