<p>There’s plenty of pure math majors here, and if you happen to take 18.701/18.702 (Algebra sequence), or 18.100B/C (analysis) you freshman year, you will meet lots of them. The thing though, is that at MIT, a lot of non-major majors (or math double majors) will also enroll in theoretical math classes (the algebra sequence is pretty popular among physics majors). I don’t see that as a turn off, since those people are also extremely smart.</p>
<p>What I notice are: there are 2 separate path/directions for math courses at MIT (applied vs. Theoretical). There tends to be a version for each type of class (18.04= applied complex variables, 18.112= Complex analysis), and if you follow the theoretical track, you pretty much don’t have to take a single applied math class, and you can get to grad level course work pretty soon (although I don’t see why you would do so, there are plenty of challenging math classes at the undergrad level). Theoretical math classes will involve a very high ratio of pset/lecture time: as in 10hrs for a pset/3 hrs of lecture. Some of my friends spend 10-15 hrs on hard math psets, and those math classes are really intense because you are probably enrolling with people who did USAMO, math research in high school etc… But they are also very helpful too!</p>
<p>Also, one plus is at MIT, a larger part of the campus will be able to understand the “pure” math culture: we crack math jokes all the time, and we understand a lot more the burden of proof etc… You might not have such a concentrated population of math-science people at Princeton.</p>
<p>On the number of classes: MIT is extremely liberal in letting students whatever they want. If you want to take 5-6 math classes every semester, go ahead. I know some people who take 6-8 classes every semester. However, as mathboy said, with pure math, quality is much, much more important than quantity. You will find out that to really understand what is going on, you will have to sit down for hours digesting proofs, and arguments until they become innate, until you can write your own versions of the proofs etc… The time commitment is very large for the “theoretical” math classes here, even for people with lots of math experience. The smartest people I know still spend anywhere between 4-8 hrs on Analysis/Algebra psets.</p>
<p>As far as the quality of the course work offered at Princeton and MIT, I’m pretty sure they are similar. There are not 50000 ways you can learn rigorous math, and the books used for both institutions for theoretical math should be pretty similar (Rudin for Analysis, etc…) You shouldn’t worry about the quality of pure math courses at either institutions, they probably don’t differ that much.</p>
<p>So to summarize, the plusses I’ve seen for MIT are:
- More freedom to play around with your schedule/academic liberty.
- more choice if you happen to decide to go applied instead or CS (lots of USAMO people I know thought they liked pure math until they hit 18.701).
- Solid and diverse curriculum for theoretical math track.
- More math/science centered student body (if you ever go to Random hall, you’ll know what I’m talking about: there are dozens of math books lying around in the lounge).</p>