Tangent-cone conjecture for partial resolutions of Yp,pY_{p,p}

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Let 1⩽k<p−11\leqslant k<p-1, and let Y‾\overline{Y} be the partial resolution obtained by blowing up kk of the lines x=z−ζjw=0x=z-\zeta^jw=0. Its isolated singularity is modeled by

Y~p−k,p−k:={xy=∏j=kp−1(z−ζjw)}⊂C4.\widetilde{Y}_{p-k,p-k}:=\{xy=\prod_{j=k}^{p-1}(z-\zeta^jw)\}\subset\mathbb{C}^4.

Let dd be the metric completion of (Y‾reg,ωˉ)(\overline{Y}_{\rm reg},\bar{\omega}). Tangent-cone conjecture. The tangent cone to (Y‾,d)(\overline{Y},d) at the singular point is isometric to Y~p−k,p−k\widetilde{Y}_{p-k,p-k} equipped with its conical Calabi–Yau metric. This predicts that the metric singularity is asymptotic to the conical Calabi–Yau metric on the corresponding deformation-equivalent isolated singularity; the source presents this as an expectation, and no resolution is given.

References

Primary source

Tristan C. Collins, Bin Guo and Freid Tong, “On the degeneration of asymptotically conical Calabi-Yau metrics”, arXiv:2006.15752 (2020).

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