Biregular models of log Del Pezzo surfaces with rigid singularities
Abstract
We construct biregular models of families of log Del Pezzo surfaces with rigid cyclic quotient singularities such that a general member in each family is wellformed and quasismooth. Each biregular model consists of infinite series of such families of surfaces; parameterized by the natural numbers . Each family in these models is represented by either a codimension 3 Pfaffian format modelled on the Pl\"ucker embedding of Gr(2,5) or a codimension 4 format modelled on the Segre embedding of . In particular, we show the existence of two biregular models in codimension 4 which are bi parameterized, giving rise to an infinite series of models of families of log Del Pezzo surfaces. We identify those models of surfaces which do not admit a -Gorenstein deformation to a toric variety.
Keywords
Cite
@article{arxiv.1711.10222,
title = {Biregular models of log Del Pezzo surfaces with rigid singularities},
author = {Muhammad Imran Qureshi},
journal= {arXiv preprint arXiv:1711.10222},
year = {2019}
}
Comments
27 pages, Improved version following referee's comments. To appear in AMS's Math. of Comp