I would really like to have an arrow which is a combination of $\hookrightarrow$ and $\twoheadrightarrow$. That is, and arrow with two heads and a hook. If anyone could help me out, it would be appreciated.
[Tex/LaTex] Special Mathematics Arrow for 1-1 and onto Functions
math-mode
Related Solutions
I can get the example that you gave to compile by moving the \label{eq:Psi-action} on to a line by itself:
\documentclass{amsart}
\begin{document}
\begin{equation}
\label{eq:Psi-action}
2=1+1
\end{equation}
\end{document}
Without that, what seemed to be happening was that it was recognising the \end{equation} as the end of a mathematics environment that was in one file but not the other, so it marked it up as \end{MATHMODE}. But for some reason it didn't spot the beginning of that environment so there was no corresponding \begin{MATHMODE}. Putting the \label on the new line seems to be enough to make it recognise the \begin{equation} once again.
Whilst doing a pretty fair job, latexdiff doesn't interpret TeX documents in the same way that TeX does. In particular, since latexdiff is a perl program, I imagine it works on a line-by-line basis, so new-lines are more important to latexdiff than to TeX. So if there are other things that are causing it to complain, try adding more new-lines to separate things so that latexdiff recognises them as separate.
And, of course, if it gets stuck on something else, ask again!
There is a larger \bigoplus that acts as operator. Or \oplus can be wrapped in \mathop:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[\bigoplus_{\substack{\rho\in g,\\\rho \neq \rho_0}}\]
\[\mathop{\oplus}_{\substack{\rho\in g,\\\rho \neq \rho_0}}\]
\end{document}
Best Answer
One way to do this is to use a
\hookrightarrowfollowed by\toto get another head, and then decrease the space between them:Thus,
$A \bij Blooks like this, and you can play with the spacing if you want.