# Why aren't the braces showing

I have this tex: $$\mu_{A}\left(x\right)\in $0,1 \right$$$

The issue here is that [ and ] are not showing around 0,1, why is that?

Thanks.

• I guess you are using latex (you didn't say) and that you got an error message (you didn't say that either). $ in latex is a command to start display math, to get a [ just use [ also you need \left on the [ or (better) don't use \right with the ] – David Carlisle Dec 3 '13 at 17:00 • \[0,1 \right$ is wrong, simply [0,1] – karlkoeller Dec 3 '13 at 17:00
• @David Carlisle. Thanks for your reply. Yes, you are right, I'm using LaTex. I didn't get an error message, just didn't get the expected result – Simplicity Dec 3 '13 at 17:09
• You _must have got an error message, I will update my answer. – David Carlisle Dec 3 '13 at 17:21

\documentclass{article}

\begin{document}

$$\mu_{A}(x)\in [0,1]$$

\end{document}


If you change the expression to the one in your question then you get the error message

! LaTeX Error: Bad math environment delimiter.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
...

l.5 $$\mu_{A}\left(x\right)\in $0,1 \right$$$
? h

where the linebreak after \[ indicates that is how far TeX had got before issuing the error.