I want the material in the align environment to be formatted as follows:
\begin{align*}
\frac {dx}{dt} = f(x,y)
\intertext{This is a differential equation. The following is an
algebraic equation:}
y = g(x,y)
\end{align*}
Is it possible? Thanks.
You could tell the filling code to break before opening braces by
customizing `LaTeX-fill-break-at-separators', see
(info "(auctex)Filling"). However, this will affect any type of braces
and not be confined to \intertext.
By the way, please don't reply to messages unrelated to your problem
because this messes up threading. If you want to discuss a new topic,
start a new thread.