Hello, In my QM class last semester, I produced a proof that wave functions must be continuous (used for boundary conditions, etc.) It was an undergraduate level course, so I don't know how easy it would be to do if you had more in the way of theory... But I've been wondering lately whether my proof was correct or not. I don't want to give away too many details, but I will say it was less than elegant (lots of cases). I was wondering if anybody knew of an easier way than I figured out, and if so, if you could take me through it step-by-step? PM me if you want to make sure that I'm not trying to trick you into doing my HW for me. I'll tell you how I did it. Thanks!