English

KSBA surfaces with elliptic quotient singularities, $\pi_1=1$, $p_g=0$, and $K^2=1,2$

Algebraic Geometry 2014-09-18 v1

Abstract

Among log canonical surface singularities, the ones which have a rational homology disk smoothing are the cyclic quotient singularities 1n2(1,na1)\frac{1}{n^2}(1,na-1) with gcd(a,n)=1(a,n)=1, and three distinguished elliptic quotient singularities. We show the existence of smoothable KSBA normal surfaces with π1=1\pi_1=1, pg=0p_g=0, and K2=1,2K^2=1,2 for each of these three singularities. We also give a list of new (and old) normal surface singularities in smoothable KSBA surfaces for invariants π1=1\pi_1=1, pg=0p_g=0, and K2=1,2,3,4K^2=1,2,3,4.

Keywords

Cite

@article{arxiv.1409.4985,
  title  = {KSBA surfaces with elliptic quotient singularities, $\pi_1=1$, $p_g=0$, and $K^2=1,2$},
  author = {Arié Stern and Giancarlo Urzúa},
  journal= {arXiv preprint arXiv:1409.4985},
  year   = {2014}
}