How to write a horizontally flipped version of \in in mathematics mode?
Google gives me \reflectbox and something like that, but I feel that there is a more straightforward way to write it since the need to use it comes naturally in mathematical texts.
\ni. For future reference, see http://detexify.kirelabs.org/classify.html – Aditya Feb 07 '13 at 19:49:)– Paulo Cereda Feb 07 '13 at 20:19