line bundle

In algebraic geometry, the term line bundle refers to a locally free coherent sheaf of rank 1, also called an invertible sheaf. In manifold theory, it refers to a real or complex one dimensional vector bundle. These notions are equivalent on a non-singular complex algebraic variety $X$ : given a one dimensional vector bundle, its sheaf of holomorphic sections is locally free and of rank 1. Similarly, given a locally free sheaf $\mathcal{F}$ of rank one, the space

$\mathcal{L}=\cup_{x\in X}\mathcal{F}_{x}/\mathfrak{m}_{x}\mathcal{F}_{x},$

given the coarsest topology for which sections of $\mathcal{F}$ define continuous functions in a vector bundle of complex dimension 1 over $X$ , with the obvious map taking the stalk over a point to that point.

Title	line bundle
Canonical name	LineBundle
Date of creation	2013-03-22 13:31:04
Last modified on	2013-03-22 13:31:04
Owner	bwebste (988)
Last modified by	bwebste (988)
Numerical id	5
Author	bwebste (988)
Entry type	Definition
Classification	msc 14-00