Convex Bodies Associated to Linear Series

Details Convex Bodies Associated to Linear Series Convex Bodies Associated to Linear Series

2008-05-29

arxiv.org/abs/0805.4559v1

Mathematics

Algebraic Geometry

51 pages, 4 figures

Scientific paper

In his work on log-concavity of multiplicities, Okounkov showed in passing that one could associate a convex body to a linear series on a projective variety, and then use convex geometry to study such linear systems. Although Okounkov was essentially working in the classical setting of ample line bundles, it turns out that the construction goes through for an arbitrary big divisor. Moreover, this viewpoint renders transparent many basic facts about asymptotic invariants of linear series, and opens the door to a number of extensions. The purpose of this paper is to initiate a systematic development of the theory, and to give a number of applications and examples.

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