$\mathbb{H}_{2n+1}$-structures on odd dimensional projective spaces

Abstract

We prove that the Heisenberg group $\h_{2n+1}$ admits infinitely many inequivalent equivariant compactifications into $\mathbb{P}^{2n+1}$ for all $n\geq 1$. This result provides an analog of Hassett-Tschinkel's classical result beyond commutative algebraic groups.