Odaka's non-compact Yau–Tian–Donaldson conjecture

Let ((X,D),L)((X,D),L) be a polarized dlt log Calabi–Yau pair with D=iDi\lfloor D\rfloor=\sum_iD_i, KX+D0K_X+D\equiv0, and LL ample on Xo:=XSupp(D)X^{o}:=X\setminus\operatorname{Supp}(\lfloor D\rfloor). Non-compact Yau–Tian–Donaldson conjecture. (1) If XoX^{o} admits a complete Ricci-flat weak Kähler metric gg whose volume growth dimension is at most dimR(X)=2dimC(X)\dim_{\mathbb R}(X)=2\dim_{\mathbb C}(X) and whose Kähler class is c1(L)Xoc_1(L)|_{X^{o}}, then (Xo,Lo)(X^{o},L^{o}) is weakly open K-polystable. (2) Such a metric, with any base point, is the pointed Gromov–Hausdorff limit of conical singular weak cscK metrics on polarized dlt log Calabi–Yau compactifications ((X,(1ϵ)D),Lϵ)((X,(1-\epsilon)D),L_\epsilon) as ϵ0\epsilon\to0, with c1(LϵXo)c1(LXo)c_1(L_\epsilon|_{X^{o}})\to c_1(L|_{X^{o}}), if and only if (Xo,Lo)(X^{o},L^{o}) is strongly open K-polystable. This is proposed as a metric-existence and correspondence principle; the source gives no resolution.

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Primary source

Yuji Odaka, “Polystable log Calabi-Yau varieties and Gravitational instantons”, arXiv:2009.13876 (2020).

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