$\delta$-invariants of Du Val del Pezzo surfaces of degree $3$

Abstract

In this article, we compute $\delta$-invariant of Du Val del Pezzo surfaces of degree $3$.

This is the second paper in the series of articles. Other parts: arXiv:2304.11412 (degrees 8,7,6,5,4), arXiv:2410.12512 (degree 2), arXiv:2410.19853 (degree 1) v2:36 pages:the structure of the text was changed, many pictures were removed