What should we call an expert majoring in mathematical physics? We call one majoring in math a mathematician, one majoring in algebra an algebraist, one majoring in geometry a geometrist, but mathematical physics is a branch of (applied) mathematics, so "mathematical physicist" might be a little weird.
Is there a big difference between theoretical physicist and mathematical physicist? Or at least between the meanings in which these two phrases are used?
@MartinSleziak emm... Mathematical physics is a branch of mathematics, while when you say "mathematical physicist", you're referring to a specific kind of physicist, so I'm not sure what should we call an expert on mathematical physics. (I have to admit it's a tricky question)