I try to write a inline formula including a greater than sign:
$A < B$
If I use the above formula in an empty document it works fine, but in my full document it will just not show up. But I can see the additional space that is included due to the presence of the "greater than" sign.
I am using LyX with the classicthesis format.
Any Ideas where I could start looking?
I've found the solution. I have set the default roman font in the LyX document, which I did not want to.
This has caused the problem.
As for the minimal working example. I did not find a good way to do this with LyX, as it is not generating soucecode as Latex does. And LyX documents are not mentionend in the default MWE article.