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arxiv: 1009.0087 · v1 · pith:XC5YKDKOnew · submitted 2010-09-01 · 🧮 math.AG · math.CO· math.DG

Algebro-geometric semistability of polarized toric manifolds

classification 🧮 math.AG math.COmath.DG
keywords deltasemistabilitytoricchowdimensionalmathbbrelativeaction
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Let $\Delta\subset \mathbb{R}^n$ be an $n$-dimensional integral Delzant polytope. It is well-known that there exist the $n$-dimensional compact toric manifold $X_\Delta$ and the very ample $(\mathbb{C}^\times)^n$-equivariant line bundle $L_\Delta$ on $X_\Delta$ associated with $\Delta$. In the present paper, we give a necessary and sufficient condition for Chow semistability of $(X_\Delta,L_\Delta^i)$ for a maximal torus action. We then see that asymptotic (relative) Chow semistability implies (relative) K-semistability for toric degenerations, which is proved by Ross and Thomas, without any knowledge of Riemann-Roch theorem and test configurations.

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