[OS X TeX] Where is this package ?

[delanoy at math.univ-lyon1.fr]

(this is a belated follow-up to one of my old posts ...)

      Hello all,


   can anyone tell me where this "backslash" package is ?
I googled "LaTeX backslash package"and did not find what I was
looking for. I did not find the package either on

 http://www.ctan.org/tex-archive/macros/latex/contrib/



                                          Ewan

>I use the backslash package with the tabular environment.
>Jean-Claude DE SOZA
>
>Le 12 mai 06 à 18:30, delanoy at math.univ-lyon1.fr a écrit :
>
>
>    Hello all,
>
>  consider the following input :
>
> \documentclass{article}
> \usepackage{amssymb}
> \begin{document}
> Here are the values of the function $f$ :
>
> \setlength{\unitlength}{1cm}
> \center{\begin{picture}(3,3)
>  \multiput(0,0)(0,1){4}{\line(1,0){3}}
>   \multiput(0,0)(1,0){4}{\line(0,1){3}}
>   \put(0,3){\line(1,-1){1}}
>   \put(0.3,2.3){$x$}
>   \put(0.6,2.6){$y$}
>                                   \put(1.4,2.4){$1$}
> \put(2.4,2.4){$2$}
> \put(0.4,1.4){$1$}  \put(1.0,1.4){$f(1,1)$}  \put(2.0,1.4){$f(1,2)$}
> \put(0.4,0.4){$2$}  \put(1.0,0.4){$f(2,1)$}  \put(2.0,0.4){$f(2,2)$}
> \end{picture}}
> \end{document}
>
>  it produces exactly the output I'm looking for, but I'm not quite
> satisfied. Is there a way
> to do it with the array environment or a related package ?
>
>  Something like
>
> \begin{displaymath}
> \begin{array}{|c|c|c|}
> \hline
> x \diagdown y & 1 & 2 \\
> \hline
> 1  & f(1,1) & f(1,2) \\
> \hline
> 2  & f(2,1) & f(2,2) \\
> \hline
> \end{array}
> \end{displaymath}
> \end{document}
>
>  is close enough, but the ``diagdown" should be replaced by
> something else...
>
>                                                               Ewan
>
>


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