I would like to create a theorem enviroment, but I would like it to end with the QED character (some few authors seem to prefer this option because Definitions, for instance, have nothing to mark their end). What I have been doing now is to do something like
Code: Select all
\begin{mydefinition}
blablalbal\hfill$\blacksquare$
\end{mydefinition}
Any clues?