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arXiv · 2605.25185

Newton-Okounkov Bodies and Jet Separation: Canonical-Free and Multipoint Generalizations

Yi Lu
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Abstract

We establish three generalizations of the Küronya-Lozovanu jet separation criterion via Newton-Okounkov bodies: if an inverted standard simplex of size $n+k+\varepsilon$ is contained in all infinitesimal Newton-Okounkov bodies at $x$, then $K_X+D$ separates $k$-jets at $x$. We prove (1) a canonical-free version with a computable multiple $m(D)$; (2) a multipoint extension for simultaneous jet separation; and (3) a combination of both. Proofs use Trusiani's framework and Nadel vanishing. We conclude with explicit computations for a double cover of a product of elliptic curves.

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Yi Lu. 2026-05-24. Newton-Okounkov Bodies and Jet Separation: Canonical-Free and Multipoint Generalizations. https://arxiv.org/abs/2605.25185

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