Math & Science ⇒ Problem with AMS symbol under $$ environment

[yoyega]

Hi, I am having a little problem with some AMS symbols. The problem is that when I use in my text something like:

Code: Select all

...even if $ W \ll L$ ...

I get an 'Undefined symbol error' pointing out to the \ll symbol. BUT if I write:

Code: Select all

\begin{equation}
W \ll L
\end{equation}

everything works fine.

Does anyone knows why the mathematical environment defined by $$ doesn't work in this case?? I am using kile editor under kubuntu 11.04

Thanks in advance,
Yoyega

[Stefan Kottwitz]

Hi Yoyega,

welcome to the board!

This code works without error:

Code: Select all

\documentclass{article}
\usepackage{amssymb}
\begin{document}
\begin{equation}
W \ll L
\end{equation}
...even if $ W \ll L$ ...
\end{document}

Try it. The problem may be caused by code which you did not show yet, please post a complete small example (as I did) which produces that error.

Stefan

[yoyega]

Hi Stefan_K, thank you very much for your reply. At the end, what I did, was to move all important files to a new directory, and to use command line instead of kile...and it magically worked!! Everything compiles now!...I don't know what the real problem was, but...

Thanks,
Yoyega

PD: by the way, nice forum...lots of information