# Tag Info

Here is the thing, I think the authors use the notation in eqn.4 in reverse order i.e, $z_L \rightarrow z_{L-1} ... \rightarrow z_1 \rightarrow x$. In this notation $z_L$ has a normal distribution $N(0,I)$ and x is the data distribution whose likelihood is supposed to be maximized. Section 3.1 provides background on the theory of transforming random ...