RELATIVE ALGEBRO-GEOMETRIC STABILITIES OF TORIC MANIFOLDS (vol 71, pg 495, 2019)

TOHOKU MATHEMATICAL JOURNAL(2023)

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摘要
In this paper we study the relative Chow and K-stability of toric manifolds. First, we give a criterion for relative K-stability and instability of toric Fano manifolds in the toric sense. The reduction of relative Chow stability on toric manifolds will be investigated using the Hibert-Mumford criterion in two ways. One is to consider the maximal torus action and its weight polytope. We obtain a reduction by the strategy of Ono [34], which fits into the relative GIT stability detected by Szekelyhidi. The other way relies on C*-actions and Chow weights associated to toric degenerations following Donaldson and Ross-Thomas [13, 36]. In the end, we determine the relative K-stability of all toric Fano threefolds and present counter-examples which are relatively K-stable in the toric sense but which are asymptotically relatively Chow unstable.
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关键词
Extremal metrics,K-stability,Chow stability,toric manifold
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