Simultaneous minimal model of homogeneous toric deformation

Details Simultaneous minimal model of homogeneous toric deformation Simultaneous minimal model of homogeneous toric deformation

1997-01-09

arxiv.org/abs/alg-geom/9701004v3

Mathematics

Algebraic Geometry

LaTeX2e, 8 pages with no figures, tyler@kurims.kyoto-u.ac.jp

Scientific paper

For a flat family of Du Val singularities, we can take a simultaneous resolution after finite base change. It is an interesting problem to consider this analogy for a flat family of higher dimensional canonical singularities. In this note, we consider an existence of simultaneous terminalization for K. Altmann's homogeneous toric deformation whose central fibre is an affine Gorenstein toric singularity. We obtain examples that there are no simultaneous terminalization even after finite base change and give a sufficient condition for an existence of simultaneous terminalization. Some examples of 4-dimensional flop are obtained as an application.

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