Recent content by juef

  1. J

    LaTeX Particular environment LaTeX help

    :!!) Exactly what I needed! Thank you!
  2. J

    LaTeX Particular environment LaTeX help

    Call me lazy, but I'd like to make a new command to quickly display a norm, something like \newnorm{x+y} (to display \|x+y\|), whether I'm in the math environment or not.
  3. J

    LaTeX Particular environment LaTeX help

    You're right, perhaps that was not very clear. I want to be able to tell if an environment is in use in a certain area during compilation. Something that may return a boolean, to be used with some other package (I believe there is a if-then package or something like that... right?).
  4. J

    Help With a driver problem.

    Maybe you could give DOSBox a try?
  5. J

    LaTeX Particular environment LaTeX help

    Hmmm... I don't think I understand how this command can help me finding out if the math environment is in use or not...
  6. J

    LaTeX Particular environment LaTeX help

    Hey all! I'm trying to learn \LaTeX, and so far I'm doing fine. However, I would like to know if it is possible to be able to find out if a particular environment is in use at a certain point. Basically, I was wondering if something like: \isInUse{math} exists in LaTeX. Does anyone...
  7. J

    MATLAB Matrix of ODE's in MATLAB

    :shy: Why on earth didn't I think of that? You can't possibly imagine how much that just helped me! Thank you very much!!
  8. J

    MATLAB Matrix of ODE's in MATLAB

    Hey all, Consider the system X' = f(X), where X is a square matrix. I would like to solve this system with MATLAB, but all of its solvers require X to be a column vector. Of course, it would be possible to rewrite X' and f(X) as column vectors, but I guess some efficiency would be lost. It...
  9. J

    MATLAB (MATLAB) Ignoring output arguments

    Hey all, Suppose I have a MATLAB function that returns two (or more) output arguments, but I only care about the second one, and I do not wish to assign the value of the first one to a variable. What bugs me is when, for example, I solve an ODE: [t, x] = ode45(blablabla) and then...
  10. J

    Fourier transform -> power spectrum

    Thank you both for this enlightment! I believe I understand much better now. Ah, well, no I didn't :shy: I should have mentioned that I'm studying maths and not physics. Thanks again!
  11. J

    Fourier transform -> power spectrum

    Fourier transform --> power spectrum Hey all! I've been learning about the discrete Fourier transform (and FFT too) recently. What I don't understand is why applying it to a signal gives its power spectrum. I am not really good in physics, so to me it just seems like a magical formulae, one...
  12. J

    Math Computer Program?

    I really like Maple, but I believe the softwares others have just mentioned will do the job for the use you're looking for.
  13. J

    I love geometry

    Yeah, I've done all that stuff. Anyway Maple is here to help me :D Are you sure b = angle ACE? It's angle CHJ on your diagram. Anyhow, I'm not sure I get that: AC = HJ.tan(b) + HJ/tan(b) + x.tan(b) + x.tan(60°). You're adding all the parts of the AC segment, right? In other words, CJ +...
  14. J

    A shorter proof to 0.999 = 1

    This is perfectly right. I don't know if there's a "shortest proof", but your friend's certainly is short. I'm somehow a newbie here, but I used to visit Tom's Hardware Guide's forums, and there's an interesting topic with... various "opinions" on the subject on it. Check it out...
  15. J

    I love geometry

    Yup, you're certainly right, because AB is on the right bisector of the circumscribed triangle... Now I was thinking of finding some sort of relation between the distance AG and the radius of the circle, but since AG isn't really defined, I don't see what we could get out of it. I also...
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