Singular Weyl's law with Ricci curvature bounded below

X Dai, S Honda, J Pan, G Wei - Transactions of the American Mathematical …, 2023 - ams.org
Transactions of the American Mathematical Society, Series B, 2023ams.org
We establish two surprising types of Weyl's laws for some compact $\operatorname
{RCD}(K, N) $/Ricci limit spaces. The first type could have power growth of any order (bigger
than one). The other one has an order corrected by logarithm similar to some fractals even
though the space is 2-dimensional. Moreover the limits in both types can be written in terms
of the singular sets of null capacities, instead of the regular sets. These are the first
examples with such features for $\operatorname {RCD}(K, N) $ spaces. Our results depend …
Abstract
We establish two surprising types of Weyl’s laws for some compact /Ricci limit spaces. The first type could have power growth of any order (bigger than one). The other one has an order corrected by logarithm similar to some fractals even though the space is 2-dimensional. Moreover the limits in both types can be written in terms of the singular sets of null capacities, instead of the regular sets. These are the first examples with such features for spaces. Our results depend crucially on analyzing and developing important properties of the examples constructed in Pan and Wei [Geom. Funct. Anal. 32 (2022), pp. 676–685], showing them isometric to the -Grushin halfplanes. Of independent interest, this also allows us to provide counterexamples to conjectures in Cheeger and Colding [J. Differential Geom. 46 (1997), pp. 406–480] and Kapovitch, Kell, and Ketterer [Math. Z. 301 (2022), pp. 3469–3502]. References
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