Abstract
Mabuchi solitons generalize Kähler–Einstein metrics on Fano manifolds, which constitute a Yau–Tian–Donaldson type correspondence with relative Ding stability. Comparing with Kähler–Ricci solitons, there is a distinct necessary condition for the existence. We show this condition can be implied by the uniformly relative Ding stability. For this, we study the inner product of \(\mathbb {C}^{*}\)-actions on equivariant test-configurations and obtain an integration formula over the total space. To analyze the uniform stability, by adapting Okounkov body construction to the setting of torus action, we give a convex-geometry description for the reduced non-Archimedean J-functionals.
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Acknowledgements
The author would like to thank Feng Wang, Jia-xiang Wang, and Naoto Yotsutani for helpful discussions, and specially thank Mingchen Xia for valuable revision suggestions. The author is supported by Grants: National Natural Science Foundation of China (NSFC) (No. 751203123) and Fundamental Research Funds for the Central Universities (No. 531118010149).
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Yao, Y. Relative Ding Stability and an Obstruction to the Existence of Mabuchi Solitons. J Geom Anal 32, 105 (2022). https://doi.org/10.1007/s12220-021-00858-z
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DOI: https://doi.org/10.1007/s12220-021-00858-z
Keywords
- Generalized Kähler–Einstein metrics
- Mabuchi solitons
- Equivariant test-configurations
- Ding stability
- Okounkov body