Hello, I believe I presented myself before, but correct me if I'm wrong. I'm a math/physics major at a community college. I'm going to transfer to an university for spring. However, I don't know if I should major in astrophysics, Math, or Math/Astrophysics. I want to go to graduate school to study mathematical physics. I recently did an internship on math and I really love the physical applications of some fields of math, such as topological quantum field theory and differential geometry. If I major in Astrophysics, it would take me 2 and half years at the univ. If I major in math, it would take me less than 2 years. And, if I do double major, it would take me 3 years at least. My question is: Is it worth it to spend more time and do double major in order to do mathematical physics in the future? or can I do mathematical physics having studied just math and the introductory physics as undergrad? PD: Why doesn't this forum have a spelling check? English is not my first language, so it would be helpful to have that.