Equation 21.13.321EA0A3B6C7EA

\begin{equation} \Phi \colon M\rightarrow \mathbb {Z}^ n,\quad m\mapsto \left(\langle m-m_{\sigma },u_{\rho _1} \rangle ,\dots ,\langle m-m_{\sigma },u_{\rho _ n} \rangle \right). \end{equation}