It seems to be the de facto standard to use \mathrm for upright letter notation in math mode as opposed to \text. Would it not be better to use \text in general? One particular problem I am thinking ...
I am trying to use Cyrillic sans-serif font in a beamer presentation. I make it using LyX 2.0.0. The code produced by LyX (exported as plain LaTeX) is %% LyX 2.0.0 created this file. For more info, ...