A Surface Degeneration With Non-Collapsible Contractible Dual Complex

Abstract

We construct a smoothing of a particular normal crossing surface, which dual complex is a duncehat, thus obtaining an example of a surface degeneration with non-collapsible, contractible dual complex. The general fiber of this family has $h^{1,0}=h^{2,0}=0$ and $h^{1,1}=9$, we conjecture that it is in the deformation class of the Barlow surface. This text is a complete rewrite of author's previous work [14].

33 pages, 3 figures

References in corpus (2)

• A simply connected surface of general type with p_g=0 and K^2=2
• Non-Collapsible Dual Complexes and Fake del Pezzo Surfaces