deletions | additions       diff --git a/untitled.tex b/untitled.tex  index a313e89..58f8eb9 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
D(Ax) = \left[ \frac{\partial (Ax)}{\partial x_1}, \dots, \frac{\partial (Ax)}{\partial x_n} \right]. \nonumber  \end{equation}  Since $Ax \in \complex^m$ is   \begin{equation} \begin{eqnarray}  Ax &=& \left[ \begin{array}{c} (Ax)_1 \\ \vdots \\ (Ax)_n \end{array} \right]  = \left[ \begin{array}{c} (Ax)_1 \\ \vdots \\ (Ax)_n \end{array} \right],  \end{equation} \right]  \end{eqnarray}  it follows that  \begin{equation}  \frac{\partial (Ax)}{\partial x_1} = \left[ \begin{array}{c}