But why are you reading research papers with math without having studied math? If you want to understand them fully then you need to do the relevant courses, people spend years learning these things. You don't have to read them all, just the branch relevant to the paper.
We are talking about nonstandard notation that is often specific to the author or to a limited research subfield, for which there are no standard courses or books that would explain the notation. You’d need to take a specific course by someone in the respective research community. Or sometimes, as noted above, it’s possible to follow back a dozen or more papers to retrace the idiosyncrasies in an almost archaeological manner.
If I try to read a program written by you without having learned the language, would you expect me to understand everything? Why aren't you explaining the symbols? That is the same thing. Learn the fundamentals of a paper before reading the paper, that is just common sense.
