do you know any good books or online resources for general relativity and/or the meat of quantum mechanics (ie math of the schrodinger equation and beyond) and/or string theory and particle physics in general? i dont mean stuff with a general overview of the topic thats dumbed down to appeal to people who want to hear that the universe has 11 dimensions so they can pass it off as fact in their next space-epic fan fiction. i want to get down and dirty with the mathematics of it.