Local numerical equivalences and Okounkov bodies in higher dimensions

Sung Rak Choi; Jinhyung Park; Joonyeong Won

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arXiv · 1808.02226

Local numerical equivalences and Okounkov bodies in higher dimensions

Sung Rak Choi·Jinhyung Park·Joonyeong Won

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Abstract

We continue to explore the numerical nature of the Okounkov bodies focusing on the local behaviors near given points. More precisely, we show that the set of Okounkov bodies of a pseudoeffective divisor with respect to admissible flags centered at a fixed point determines the local numerical equivalence class of divisors which is defined in terms of refined divisorial Zariski decompositions. Our results extend Ro\'{e}'s work on surfaces to higher dimensional varieties although our proof is essentially different in nature.

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Sung Rak Choi, Jinhyung Park, Joonyeong Won. 2018-08-07. Local numerical equivalences and Okounkov bodies in higher dimensions. https://arxiv.org/abs/1808.02226

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