Decomposition of log crepant birational morphisms between log terminal surfaces

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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.
4 pages, AMSTex v2.1

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Algebraic Geometry, 14E05;14E30;14E35

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http://salesiana.dossiersoluciones.com/handle/123456789/78698

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9906143
 http://arxiv.org/abs/math/9906143

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arXiv