So, I want to major in TAM (Theoretical and Applied Mechanics) for my graduate degree which would be a PhD. I'm wondering what kind of major for undergrad would be best for that since the university I want to go to doesn't offer that as an undergrad major. The relevant undergrad majors would be Mechanical Engineering, Engineering Mechanics, Engineering Physics, and possibly others but I think these are the best. I would also like to know what kind of classes I should take. How heavy is TAM in math and physics? I don't want to just stop taking math classes at some point ending with differential equations or something like that. I heard TAM requires heavy mathematics but I'm not sure about that and I need confirmation. One of the descriptions I read was a unity between engineering, physics, and mathematics. Is this accurate? If TAM doesn't really incorporate advanced mathematics, what type of engineering does? Also, what kind of research positions would I be able to get? Thanks.