Decomposition of log crepant birational morphisms between log terminal surfaces

Details Decomposition of log crepant birational morphisms between log terminal surfaces Decomposition of log crepant birational morphisms between log terminal surfaces

1999-06-22

arxiv.org/abs/math/9906143v1

Mathematics

Algebraic Geometry

4 pages, AMSTex v2.1

Scientific paper

We prove that every log crepant birational morphism between log terminal
surfaces is decomposed into log-flopping type divisorial contraction morphisms
and log blow-downs. Repeating these two kinds of contractions we reach a
minimal log minimal surface from any log minimal surface.

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