I will be taking linear algebra and number theory during the coming fall semester. I was also hoping to take a graduate level course in topology or analysis as well but because of time conflicts I cannot register for the class. My school does offer courses in set theory and logic and these are considered "graduate" level but it looks more like borderline advanced undergraduate level than anything. I really enjoy analysis and number theory. Would set theory or logic have any relevance? In particular, would they have any relevance to grad school?