,B_{n};\omega)$ centered at $(B_{0},\ldots,B_{n})$ in $\mathcal{M}_{k}(\mathbb{C})^{n}$ to be the subset of $\mathcal{M}_{k}(\mathbb{C})^{n}$ consisting of all $(A_{0},\ldots,A_{n})$ in $\mathcal{M}_{k}(\mathbb{C})^{n}$ such that $\Vert