Invariant Hilbert scheme resolution of Popov's $SL(2)$-varieties II: the non-toric case

TL;DR

This paper extends previous work on invariant Hilbert scheme resolutions to non-toric 3-dimensional affine normal quasihomogeneous SL(2)-varieties, showing the Hilbert-Chow morphism provides a resolution of singularities.

Contribution

It demonstrates that for non-toric cases, the Hilbert scheme yields a resolution of singularities and is isomorphic to the minimal resolution of a weighted blow-up.

Findings

Hilbert-Chow morphism resolves singularities in non-toric cases.

The Hilbert scheme is isomorphic to the minimal resolution of a weighted blow-up.

Extension of invariant Hilbert scheme resolution to non-toric SL(2)-varieties.

Abstract

This article is a continuation of [Kub18], which proves that if a $3$-dimensional affine normal quasihomogeneous $SL(2)$-variety $E$ is toric, then it has an equivariant resolution of singularities given by an invariant Hilbert scheme $\mathcal H$. In this article, we consider the case where $E$ is non-toric and show that the Hilbert-Chow morphism $\gamma : \mathcal H \to E$ is a resolution of singularities and that $\mathcal H$ is isomorphic to the minimal resolution of a weighted blow-up of $E$.