I'd say AlexChandler's solution is flawed. He is assuming that the bob will take 1/4 of a period to travel 1/4 of a round trip which is how most people would tend to think off guard. The motion is not uniform but is well known to be non-elementary. Fortunately, the small angle approximation...
Yes, it is outlined in Di Francesco's book "Conformal Field Theory" page 189: I'll give you a link to google books since there is a free preview of that chapter ...
Pivoxa15, your definition of compactness is not the most general one. It relies on defining what a bounded set is , which in turn relies on some concept of "size". This is generally done by using norms but sometimes you don't have a norm to work with.
The hierarchy of spaces is as follows...
I was thinking of the formal definition of a Hamiltonian as a Legendre Transform. A Legendre Transform IS an optimal value of a new function , say H which depends on the two previous sets of variables (q and v) and another set of variables ( p) but the real optimized function ( optimized with...
Ok you haven't tried hard Pivoxa
Hint:
use A= [A - (A \cap B)] \cup (A \cap B) \hspace{10pt}\text{or}\hspace{10pt} B= [B - (A \cap B)] \cup (A \cap B) and see what you get from it.
No! it shouldn't be function of anything because it's an ARBITRARY POSITIVE REAL NUMBER ( as such it must be different from 0). When you do an epsilon -- delta proof you must prove that, given an epsilon , which you don't know anything of, some in/equality holds whenever your variable ( x)...
Hi!
I've been studying Dirac's programme for some time and I realized that there's something missing:
Actually this is missing in every standard book on classical mechanics concerning how constraints are implemented in the lagrangian.
They are usually inserted with some unknown variables...
Yeah jaxodraw's code gave me no problem, just needs to be adjusted manually because when you draw it by hand sometimes the arrows are not in the exact place you want them. I guess this wouldn't be a problem if i were using FeynMF.
Well I knew my code for feynmf wasn't right :S but my problem is...
yes, i did include it. I'm using jaxodraw now... i think I'll stick to it..but if you can enlighten me with this feynmf package that would be awesome maybe other people are still struggling to get it work...
thanks anyway..
Thanks, I'm trying to install the application... I'll be happy if i can get a decent diagram complied with texnicenter but still I would like to learn the feynMF package.. so if theree's someone who can explain me all the details I would really appreciate it.
Thanks for your help
Hi! I need some help with latex. I need to draw Feynman diagrams and it seems that the package feynmfm relies on Metafont, which I really don't even have the slightest idea as how to use it.
Anyway, I tried to find a good tutorial on the subject (metafont) but it looks like i will need some...
WOULD SOME1 HELP ME WITH THIS ANNOYING PROBLEM I CANT SOLVE :
a cat is wrapped around a fixed cylinder .theres friction between the rope and da cylinder with a coefficient of friction (mu) , the angle covered by the rope on the cylinder is (pi)/3 .assume a really thin rope. A cat is pulling on...