Extremality of Quaternionic Jørgensen Inequality

Krishnendu Gongopadhyay, Abhishek Mukherjee

Let $\mathrm{SL}(2,\mathbb{H})$ be the group of $2\times 2$ quaternionic matrices with Dieudonné determinant $1$. The group $\mathrm{SL}(2,\mathbb{H})$ acts on the five dimensional hype…