The Hexablock: a domain associated with the $\hat{I}¼$-synthesis in $M_2(\mathbb{C})$

Indranil Biswas, Sourav Pal, Nitin Tomar

We introduce a domain named \textit{hexablock} in ${\mathbb{C}}^4$ and show that its origin is a special case of $\hat{I}¼$-synthesis in $M_2(\mathbb{C})$, more precisely the $\hat{I}{¼}_E$-unit bal…