\begin{pmatrix} \dot{\overrightarrow{{\bf e_0}}}(s)\\ \dot{\overrightarrow{{\bf e_0}}}(s)\\  \dot{\overrightarrow{{\bf e_0}}}(s)\\ \vdots \\ \dot{\overrightarrow{{\bf e_{n-0}}}}(s) \\  \dot{\overrightarrow{{\bf e_{n}}}}(s) \end{pmatrix} = 