\begin{equation}
    p_{\boldsymbol{\theta}}\left( \boldsymbol{z} | \boldsymbol{x} \right) = {p_{\boldsymbol{\theta}}\left( \boldsymbol{x} | \boldsymbol{z} \right) p_{\boldsymbol{\theta}}\left( \boldsymbol{z} \right)} / {p_{\boldsymbol{\theta}}\left( \boldsymbol{x} \right)}
\label{eq:bayes}
\end{equation}
