\begin{isabelle}% \isacommand{lemma}\ {"}{\isasymnot}\ m\ <\ n\ {\isasymand}\ m\ <\ n+1\ {\isasymLongrightarrow}\ m\ =\ n{"}\isanewline \end{isabelle}% %%% Local Variables: %%% mode: latex %%% TeX-master: "root" %%% End: