Math & Science ⇒ Warning: Command \textfractionsolidus invalid in math mode

[doya]

Hello,

my problem is, that my formula appears to be correct but produces 6 warnings. I don't find any useful help in internet and hope somebody here could tell me what my mistake ist. Here is the code:

Code: Select all

\begin{equation}
\delta^{18}O\ [\text\textperthousand]= \frac{(\delta^{18}O⁄\delta^{16}O)_{sample}-(\delta^{18}O⁄\delta^{16}O)_{standard}}{(\delta^{18}O⁄\delta^{16}O)_{standard}}\times1000
\label{DeltaNotation18O}
\end{equation}

[localghost]

Please always provide a self-contained and minimal example that shows which packages you load to create the output. It's always hard to guess what is needed because nobody ca remember all packages.

As the name of the command suggests, it can only be use in text mode. The problem is caused by a forgotten pair of curly braces for the \text command (from amsmath) around \textperthousand.


Best regards and welcome to the board
Thorsten