Odaka's product behavior conjecture for minimally non-collapsing limits
Odaka's product behavior conjecture for minimally non-collapsing limits
Let be a degeneration satisfying the paper's special maximal-degeneration expectation, and let be a fixed pointed polarized -dimensional Calabi–Yau variety with point . Consider the product degeneration with fibers and polarization . Product behavior conjecture for minimally non-collapsing limits. The minimal non-collapsing limit of the fiber Ricci-flat Kähler metrics is isometric to the metric product of the minimal non-collapsing pointed Gromov–Hausdorff limit of at and the metric tangent cone of at . This expectation is proposed as a counterexample to extending the preceding special-degeneration expectation to general products, and is said to be easily verified for degenerating polarized abelian varieties; 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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