Vanishing theorems for $L^2$ Dolbeault cohomology groups of projective Hartogs triangles

Abstract

In this note, using J.-P. Demailly's $L^2$ existence theorem for possibly incomplete Kähler metrics, we establish $L^2$ estimates and vanishing theorems for a class of domains in $\mathbb P^n$ without any boundary regularity assumptions. In particular, we give an affirmative answer to M.-C. Shaw's question concerning the vanishing of the $L^2$ Dolbeault cohomology groups of projective Hartogs triangles.