GIT quotients of products of projective spaces

Details GIT quotients of products of projective spaces GIT quotients of products of projective spaces

2006-06-07

arxiv.org/abs/math/0606148v2

Mathematics

Algebraic Geometry

26 pages

Scientific paper

The aim of this work is to study the quotients for the diagonal action of SL_3(C) on the product of n-fold of \mathbb{P}^2(C): we are interested in describing how the quotient changes when we vary the polarization (i.e. the choice of an ample linearized line bundle). We illustrate the different techniques for the construction of a quotient, in particular the numerical criterion for semi-stability and the ``elementary transformations'' which are resolutions of precisely described singularities (case n=6).

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