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That requires manual tweaking of the horizontal spacing. Of course, for the example's sake, I just wrote down one constraint, but any real LP would have about a dozen. The domain constraints should be aligned to the right (i.e. all an equal distance to the equation numbers).

I'm thinking there must ...

Tonguim said he was using beamer. I'm guessing the problem is not in the lstlisting environment, but rather how beamer deals with verbatim-type environments. This is why mas' code probably doesn't compare.

Tonguim, did you remember to make the slide fragile (as Joseph did)?


\begin{frame}[fragile ...

I've put the alternatives in a more extensive example. The attachment contains the code in a listings environment.

Well, \ref{everything} now results in "\forall i\quad(2)" instead of just "2"

I want it to look exactly like what it looks like when I run the example code, but with correct references. If you run the code above, you get the attachment.

I have this problem as well and, for me, the && is no solution. In typesetting Linear Programs (LPs), I want my domain constraints to be aligned to the far right (i.e. juxtaposed to the equation number). This makes the LP look right, but messes up the references:

\begin{align}
\text{minimize}\quad ...