Mathematics – Algebraic Geometry
Scientific paper
2007-12-10
Mathematics
Algebraic Geometry
Scientific paper
In this note we give a quick and simple proof of the existence (and uniqueness) of Zariski decompositions on surfaces. While Zariski's original proof employs a rather sophisticated procedure to construct the negative part of the decomposition, the present approach is based on the idea that the positive part can be constructed from a maximality condition. It may also be useful that this approach yields a practical algorithm for the computation of the positive part.
Bauer Thomas
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