Let me start off with saying that I am an undergraduate who just started his second year. Im enrolled in classes such as Partial Differential Equations, Complex Variables, Linear Algebra, Astrophysics, and a Physics Problem Solving Class. I really enjoy math as a tool, and as a subject alone. I was wondering, since I also really enjoy physics, what I should do if I enjoy both very much. I was thinking theoretical physics or cosmology but have no idea the math that goes into it. Thanks for your answers in advance.