I started to use prosper package recently.
It seems like there is a bug in tetex for Mac OS X (or tetex in general?).
The following code works in PC.
\overlays{3}{
\begin{slide}{example}
\begin{eqnarray*}
\onlySlide*{1}{lhs &=& \phantom{rhs 2} \\}
\fromSlide*{2}{lhs &=& rhs \phantom{2}\\}
\fromSlide*{3}{\phantom{lhs} &=& rhs 2\\}
\end{eqnarray*}
\end{slide}
}
However, it does not in tetex for Mac.
I needed to modify the code as the following to make it work .
\newcommand{\annn}{&}
\overlays{3}{
\begin{slide}{example}
\begin{eqnarray*}
\onlySlide*{1}{lhs \annn = \annn \phantom{rhs 2} \\}
\fromSlide*{2}{lhs \annn = \annn rhs \phantom{2}\\}
\fromSlide*{3}{\phantom{lhs} \annn = \annn rhs 2\\}
\end{eqnarray*}
\end{slide}
}
Isn't it strange?
Joon Song
