Le 08 Dec 2009 17:34, andrea a écrit:
>
> I have to write things like
> f(x) = | 0 if x == 1
> | 1 otherwise
>
> with the big curly bracket.
> It's a common thing and I found in latex is like here
> http://www.mathhelpforum.com/math-help/latex-help/59690-left-curly-brace.html
> Using \left{ and \begin{gathered}
> For some reasons anyway it doens't work.
>
> This
> --8<---------------cut here---------------start------------->8---
> $\phi_{sum}(g1))(\bot) = (\phi_{sum}(g2))(\bot) =$ \newline
> \begin{gathered}
> 1 if x < 0 \\
> \bot otherwise \\
> \end{gathered}
> --8<---------------cut here---------------end--------------->8---
>
> doesn't to what I'd like it to do.
> Any idea?
No idea, did you try with \begin{cases}...\end{cases} ?
You can also use \left\{...\right followed by an array.
Olivier
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