For physics majors pursuing a math minor, recommended upper division math classes include vector field theory, partial differential equations (PDEs), numerical analysis, differential geometry, and linear algebra. These subjects are particularly relevant for applications in physics, such as Stokes' theorem in vector calculus, and the mathematical foundations of quantum mechanics and general relativity. Complex analysis is highlighted as a valuable course, especially for those interested in advanced topics like conformal mapping in electrostatics and integration in the complex plane. It is suggested that students already cover calculus and ordinary differential equations as part of their physics curriculum, allowing them to focus on linear algebra, complex variables, and either numerical methods or group theory, depending on their interests in programming or theoretical physics. Overall, these courses enhance the mathematical toolkit essential for advanced studies in physics.