Recent content by PhysKid24

E is a polar vector, can be thought of to be the basis of a cube represented in Oh

does anyone know what representation in group Oh = O x i , is the polar vector E a basis? E has components Ex, Ey, and Ez. How would I go about showing this? Thanks.

Is the second derivative with respect to position a hermitian operator? (i.e. d^2/dx^2)? Can anyone prove it? I don't think it is. Thanks

Is the second derivative with respect to position a hermitian operator? (i.e. d^2/dx^2)? Can anyone prove it? I don't think it is. Thanks

I would just like to know, in the simplest explanation possible, why the speed of light is so fast? A student of mine asked me the question and I wasn't able to come up with a good enough answer. thanks

Hi, I keep having problems with a homework question regarding irreducible representations. For the C2 group,which has only two elements,say, e and a, Iwas able to find the regular representations for them, yet i don't know how to find an irreducible representation for them. I'm also supposed...

hi, does anyone know the character table for the inversion group?

But how do you know what the conjugacy classes are, and what do you mean they are not conjugate? So 1^2 + 3^2+3^2 = 10, which is the order of the group, and tells me I have 3 irreducible reps, but what is meant by 3-dimensional? Thanks a lot

Hi, this problem has been giving me difficulty. A certain finite group is of order 10. Does it have a 3-dimensional irreducible representation? Why or why not? Does anyone know?

Hi, I have a question regarding group theory. For the cyclic group C2 with elements e and a, what are the matrices of the regular representation? How do you find this? How would I reduce this representation into irreducible representation? Lastly, how do I find a matrix which brings the...

Hi. Can anyone help me figure out how to find the conjugacy classes for a certain group and the elements in each class. I'm looking at the dihedral group of degree 5 (D5). I found the 10 elements in the group, but I don't know how to get the conjugacy classes and the elements in them? Can anyone...

For a finite group G, I need to prove that the order of an element in G is a divisor of the order of the group. I'm not sure what this exactly means, but I think you have to use cyclic groups such that G={a^0,a^1,...,a^n) where n+1 is the order of the group and a^0 is the identity element. So I...

Hi I was just wondering what the answer to the following question would be: If you bring a positively charged rod to an uncharged electroscope causing the vanes or leaves inside to diverge, are negative charges attracted to the knob of the electroscope or do positive charges repel to the...

Thanks, do u know where I can find such a statement on the internet?

Thanks, would u agree that 0 divided by infinity is somethign undefined as well? Thanks for all your help.