From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olivier Schwander <olivier.schwander@chadok.info>
Subject: Re: Big curly bracket
Date: Tue, 8 Dec 2009 17:56:33 +0100
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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