# [texhax] a question for logicians

PR Stanley prstanley at ntlworld.com
Fri May 2 17:27:23 CEST 2008

```Hello,
I think you're refering to the inverted pawnbrokers' sign which is
read as "therefore" or "then" ( I think) in mathematics. The macro In
the amsmath usepackage is "\therefore".
I hope it helps.
By the way, folks, I'm Paul, a blind student of software engineering
the visual effects of tex/latex macros meself. :-)
Cheers, Paul

At 15:41 02/05/2008, you wrote:
>Hi!
>
>There is a symbol that I don't know how to write it in Tex/laTex .I
>saw lots os documents, websites, and none of them show this symbol.
>
>It is a triangle made of 3 points, instead of lines. In a logic
>expression, it is used to give us the result.
>For exemplo if \exists ... therefore ...
>
>How can I write this symbol?
>
>Thank you,
>Alexandre.
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