Classification of Gorenstein Toric Del Pezzo Varieties in arbitrary dimension

Details Classification of Gorenstein Toric Del Pezzo Varieties in arbitrary dimension Classification of Gorenstein Toric Del Pezzo Varieties in arbitrary dimension

2009-04-12

arxiv.org/abs/0904.1880v1

Mathematics

Algebraic Geometry

Dedicated to the memory of Professor V. A Iskovskih, 34 pages, LaTeX

Scientific paper

A $n$-dimensional Gorenstein toric Fano variety $X$ is called Del Pezzo variety if the anticanonical class $-K_X$ is a $(n-1)$-multiple of a Cartier divisor. Our purpose is to give a complete biregular classfication of Gorenstein toric Del Pezzo varieties in arbitrary dimension $n \geq 2$. We show that up to isomorphism there exist exactly 37 Gorenstein toric Del Pezzo varieties of dimension $n$ which are not cones over $(n-1)$-dimensional Gorenstein toric Del Pezzo varieties. Our results are closely related to the classification of all Minkowski sum decompositions of reflexive polygons due to Emiris and Tsigaridas and to the classification up to deformation of $n$-dimensional almost Del Pezzo manifolds obtained by Jahnke and Peternell.

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