Command \' invalid in math mode on input line with 2^...

[Stefan_K]

Hello,
I have a compilation problem with a specific command.
First, I have to mention that I do have the ams package.
Second, I also have all the babel french libraries to take punctuation into account.
Third, I use TeXnicCenter.

I first did this:

Code: Select all  •  Open in writeLaTeX

\item Indiquez que la validité sera vérifiée pour 2^{\operatorname{ Nb. d'éléments } }

then I had the warning: \ ' invalid in math mode on input line ...

So I changed it for:

Code: Select all  •  Open in writeLaTeX

\item Indiquez que la validité sera vérifiée pour \begin{equation} \text{ 2^{\operatorname{ Nb. d'éléments } } }\end{equation}

But now the told me that I am missing $ signs!

! Missing $ inserted. <inserted text> $
and I still have LaTeX Warning: Command \' invalid in math mode on input line ...

See, this is a never ending problem!

What the trick with these kind of things?

[localghost]

Well, the error message is very clear. The „^“ command for superscripts is only allowed in math mode. For text mode you may use \textsuperscript{2}. Due to the lack of a minimal example this is all I can advise.


Best regards and welcome to the board
Thorsten

[Félix]

Thank you, it worked perfectly well. But you probably meant that I should write
2\textsuperscript{Nb. d'éléments}. Anyway, thank you again for that.