Jackson: t-minus three semesters and counting!!! Okay, help me with this thought-experiment: I was wondering how well-prepared for graduate (Jackson) electromagnetism I would be if I had studied the entirety of Griffith's "Intro...Electrodynamics" one year beforehand. What subject-matter would I still be missing, so to speak? I'll have a summer before I have to study out of Jackson's book, so I was wondering if there was anything I should study beforehand, as preparation. Would a math-course in partial-differential-equations (whatever that means...) help? I also wish to study general relativity during the same semester: what prior-knowledge should I amass during the summer beforehand?