LaTeX.org

Hi guys,

I've just started using LaTeX and I'm having troubles using align . I am using the following piece of code:
\begin{align*}
\begin{pmatrix}
\hat{S}^* \\
\hat{I}^*
\end{pmatrix}
=
\begin{pmatrix}
0 \\
0
\end{pmatrix}
\implies
\lambda_{1}=u, \lambda_{2}=-v
\implies
\begin{pmatrix}
0 \\
0 ...