Main Question or Discussion Point
In about a month or perhaps less I believe I will have finished my reading of Shankar. Which textbooks would you consider to be a next step from that? There are 3 things I would appreciate. One is slightly more mathematical rigour, perhaps something that makes greater use of methods from functional analysis to ground the math used. The lack of coverage of rigged Hilbert spaces in Shankar kind of confused me about what you can and what you can't do and why. Another thing would probably be more applications. Finally, I'd like something with more problems, I wasn't very satisfied with the problems in Shankar. They were scattered all over the place, and there were too few.