I have written a document containing a formula. I gave it to a friend and when she opened it the user-defined symbols didn't work. What's the matter?

I have written a document containing a formula. I gave it to a friend and when she opened it the user-defined symbols didn't work. What's the matter?

This is a known issue with Math. The user-defined symbols are part of the user settings and are not saved with the formula.

Furthermore the predefined user-defined symbols have localized names, for example %alpha might be %alfa in other languages, so that even these symbols can cause trouble. There is currently no solution to the problem, but it is being worked on.