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K-Stability of Fano spherical varieties
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abstract
We prove a criterion for K-stability of a $\mathbb{Q}$-Fano spherical variety with respect to equivariant special test configurations, in terms of its moment polytope and some combinatorial data associated to the open orbit. Combined with the equivariant version of the Yau-Tian-Donaldson conjecture for Fano manifolds proved by Datar and Sz\'ekelyhidi, it yields a criterion for the existence of a K\"ahler-Einstein metric on a spherical Fano manifold. The results hold also for modified K-stability and existence of K\"ahler-Ricci solitons.
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Cited by 1 Pith paper
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A technical remark on the Donaldson-Futaki invariant for Fano reductive group compactifications
For Fano reductive group compactifications, the Donaldson-Futaki invariant of an affine-linear test configuration equals half the inner product of the function's gradient with the difference between the polytope's bar...
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