Recent content by bartadam

That's because I have been sloppy writing stuff.

oh cheers. Yeah I came across that page but didn't see the bit where it said 'click here' :lol: Sorry that just made me look lazy.

lol thanks. I was worried I was being completely thick then. don't suppose you have a link do you for where I can see it for free? can't find it. Im generally confused on this whole matter. Ultimately I want to perform a super poincare transformation on superspace. I.e a susy transform then a...

Then now I really do not understand. In order to maintain covariance the following expression is true. S_{-1}(\Lambda)\gamma^{\mu} S(\Lambda)=\Lambda^{\mu}_{\nu}\gamma^{\nu} if we write a lorentz transformation on a spinor as \psi'(x')=S(\Lambda)\psi(x)=S(\Lambda)\psi(\Lambda_{-1}x') then say...

I'm very confused By performing a lorentz transformation on a spinor \psi\rightarrow S(\Lambda)\psi(\Lambda x) and imposing covariance on the Dirac equation i\gamma^{\mu}\partial_{\mu}\psi=0 we deduce that the gamma matrices transform as S(\Lambda)\gamma^{\mu}...

I have a six dimensional lie algebra. I checked it was semi-simple by checking if the killing form was not invertible. I found a set of two (I think) maximally commuting elements which I called H1 and H2 and found their matrix representation by calculating the structure constants. I have put...

Thanks, yeah it dawned on me sorted it. Forgot my elementary linear algebra. Thank for your reply.

say I have a set of basis vectors of a vector space v1, v2...vn and some element of the vector space, say V What command do I use in maple to calculate the coordinates of V in this basis? I can't find one in the linalg package

Hi again, I could really use some help on this please. I have also realized T1+T2+T3=0. I do not understand. Does this mean g1+g2+g3=0. I do not believe this at all.

maybe your teacher meant water molecules are polarised.

Anyone? Any help would be good.

What matters most in a car is the following... a) Fuel economy and emisions b) crash worthyness c) reliability What you want is the most uneconomical and polluting car there is, something with a big dirty V8 or something. No electronics or high tech stuff. Just basic engine, gearbox and wheels...

I have a lie algebra whose killing form is degenerate, hence not semi simple by cartan's second criterion. So I cannot apply a Cartan Weyl Basis to classify the algebra. I currently have an algebra with 5 generators. Later I will have one with 11 generators and I am hoping I can spot how i...

yes group multiplication. I don't know why it's specifying closed subgroup to be honest. The word is redundent. Yes I didn't bother with associativity but at this time in the evening I couldn't be arsed lol

I don't understand what the problem is. All subgroups are closed otherwise it's not a subgroup it's just merely some subset of G