2 papers
math.AG2026
Degenerations of the complex projective plane with only rational singularities
Marcos Canedo, Giancarlo Urzúa
Wahl's conjecture states that two-dimensional singularities admitting a rational homology disk smoothing are weighted homogeneous. Assuming the conjecture, we classify all normal d…
math.AG2026
Rational homology disk degenerations of elliptic surfaces
Marcos Canedo, Giancarlo Urzúa
In this paper, a HD singularity is a weighted homogeneous normal surface singularity admitting a rational homology disk (HD) smoothing. These singularities…