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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-08-02 and was most recently seen on 2026-08-02.
In mathematics, a distinctive feature of algebraic geometry is that some line bundles on a projective variety can be considered "positive", while others are "negative". The most important notion of positivity is that of an ample line bundle, although there are several related classes of line bundles. Roughly speaking, positivity properties of a line bundle are related to having many global sections. Understanding the ample line bundles on a given variety amounts to understanding the different ways of mapping into projective spaces. In view of the correspondence between line bundles and divisors, there is an equivalent notion of an ample divisor.
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