Recent content by Yuu Suzumi

  1. Yuu Suzumi

    Graduate How is the Relativistic Larmor Formula Derived Using Dot Products?

    This (http://www.ita.uni-heidelberg.de/research/bartelmann/Lectures/elektrodynamik/edynamik.pdf ) lecture has a derivation of the relativistic Larmor formula I once comprehended - around page 159. There are two catches: 1) It's in German (but many formulae, so you might get it) 2)I don't...
  2. Yuu Suzumi

    Square of transpose of two matrices

    Thanks! That is a policy I can endorse. We want the OP to feel proud of his solution, after all.
  3. Yuu Suzumi

    Square of transpose of two matrices

    Yes. At least that's what I got too :-) Do you know where the thread is in which they describe how much we are allowed to help I am HW forums? I can't find it and therefore I am limiting myself to remarks like above.
  4. Yuu Suzumi

    Q: How to compute P(X=200 and Y<150)?

    Be careful! When the six is removed, how many numbers share the 800 trials?
  5. Yuu Suzumi

    Q: How to compute P(X=200 and Y<150)?

    If you know the number 6 appears 200 times, what would you say about the way in which the outcomes of the remaining 800 rolls are distributed?
  6. Yuu Suzumi

    Square of transpose of two matrices

    With the hint given by haruspex you can arrive at one of those! Find two ways to write ABA!
  7. Yuu Suzumi

    Old questions: Should you answer them? How old is too old?

    I second that! I shall try to answer the questions for which I feel that I have a good answer, regardless of posting time. Provided they are generally useful (meaning that someone could have a similar problem in future)
  8. Yuu Suzumi

    Thermodynamic Proof: Show PV^k=constant

    It has been a while since I last did thermodynamics. But why may I not write this: k \equiv -\frac{\frac{dp}{p}}{\frac{dV}{V}} = \frac{Vdp}{pdV} and then, using that I have an isentropic process: k = \frac{dH}{dU} = \frac{C_p}{C_v}. If this is still valid, then k can not be constant in a...
  9. Yuu Suzumi

    Thermodynamic Proof: Show PV^k=constant

    Are you sure they are claiming this more generally than for an ideal gas? I remember that even for Van der Vaals Gases this expression has to be modified in a way similar to the equation of state!
  10. Yuu Suzumi

    MATLAB Plotting a potential function in MATLAB

    Hello Maxtor, I believe the surf() function in MATLAB to be suited for your purposes. After defining \phi_1, \phi_2, V in MATLAB you would use it in this way: surf(phi_1, phi_2, V). Information and examples are available here: http://www.mathworks.de/de/help/matlab/ref/surf.html All the...
  11. Yuu Suzumi

    Undergrad Convexity of a function I don't understand

    Is the argument of f perhaps a vector and the x_i the components thereof? I am sure they are not meant to be the same.
  12. Yuu Suzumi

    Square of transpose of two matrices

    Do you remember what (AB)^T is in terms of A^T and B^T? Have you tried using that?
  13. Yuu Suzumi

    Why Are Pointers Necessary in Programming?

    A very paedagocical example is given here: http://stackoverflow.com/questions/5680164/why-pointers-are-necessary-in-programing I am not copy-pasting it in order not to take credit for other peoples explanatory skill.