For example when you say,
(when the "sin" would not be upright, it would even mean s*i*n*1/2)
you don't remember the "lineal functions" (archs) in a circle that are
typed with the first letter upright, like this:
I meant upright (the opposite of italic) and not uppercase.
Nevertheless, Bruce also described what I meant in his today's post in this email thread: You are
using your own typesetting rules making communication with the rest of the world complicted.
The appendix of LyX's Math manual consists of a list of math typesetting rules. You might at least
have a look at them in case you have to read math in books that are not specially written for naval