Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I want to learn something new.

  1. May 10, 2005 #1
    I'm a math/physics major, and I just finished my freshman year of college. I have almost 4 months off, so I decided I'd like to teach myself some subject in the realm of math. I've taken vector analysis/calc III, linear algebra, and advanced calculus.

    Advanced calc. at my university is, as I understand it, supposed to be a somewhat rudimentary version of real analysis. We used Rudin's text (Principles of Mathematical Analysis), and went through chapter 6 (on integration), skipping sections liberally (ie, we completely ignored Lebesgue integration).

    So, what would you recommend I do with myself? I'm looking for something interesting, that doesn't necessarily have to build on what I've already learned (chaos theory, I believe, is like this [am I right?]). I really enjoyed Calc III, so I was thinking about something like fluids, but I'm not sure if I have the background for that.

    Any help would be appreciated, I have no idea where to start looking, what books to look into, etc.

    Edit: I'll be taking probability and ODE (diff eq's) in the fall, if this is of any consequence.
    Last edited: May 10, 2005
  2. jcsd
  3. May 10, 2005 #2
    double post
  4. May 10, 2005 #3
    Start studying those ODEs, they are the basis of mathematical physics.
  5. May 10, 2005 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    How about differential geometry or group theory? Both have direct applications in physics, and both are very interesting in their own right.

    - Warren
  6. May 10, 2005 #5
    Is there any advantage to start teaching myself ODE now? I figured there would be no point since I'm going to take the course in the fall.

    Sounds good, I'll look into those two.

    Thanks for the responses, if anyone has any more ideas I would be grateful.
  7. May 13, 2005 #6
    Advatage #1: You will get an easy A in your course and be able to concentrate on other studies.

    Advantage #2: You will get a head start on learning something that would take many lifetimes to learn.

    Advantage #3: You have already taken linear algebra. LA is a very elegant viewpoint from which to study linear differential equations, but this is angle is usually not explored in a first course on ODEs. If you begin studying ODEs now, by the time you actually take your course you will have a much more sophisticated perspective of whats going on in class.

    Advantage #4: In mathematics, you don't understand things, you just get used to them (Von Neumann). So the sooner you expose yourself, even a little, the better off you are.
  8. May 14, 2005 #7
    I don't agree, but it seems that is certainly the philosophy behind math classes for non-science students. A friend of mine is taking "calculus for commerce", in which they don't even learn the delta epsilon notation for a limit. They are learning it a la "1/x^n goes really small when n is infinity, so let's call it zero!"
  9. May 14, 2005 #8
    I think Neumann's quote is about how symbolic manipulation is at the root of what we call "understanding".

    The idea of a limit is directly useful to an economist, but the epsilon-delta formalism is only indirectly useful for increasing mathematical maturity. I think it is possible to understand limits without the epsilon delta notation. (As many great mathematicians did).
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook