I have been trying to align the "<" and ">" after t_{c} with that of the equal "=" sign in the second matrix (see the codes below). Any ideas on how I can do that?
I'm using the following codes:
\begin{equation}
\begin{aligned}
\sigma(t_{c})=\left\{\begin{matrix}
1\\ [0,1]
\\
0
\end{matrix}\right.\text{if } t_{c} \left\{\begin{matrix}
< \\
=\sfrac{-\alpha N(m_{c},m_{e})}{v_{c}^{d}}.\\
>
\end{matrix}\right.\label{eqn:13}