Recent content by omri3012

Thankes, It's very helpful :)

Does anyone familiar with a convenient way in Mathematica to define a case function such as: y(x)=\left\{\begin{array}{c} x \\ -x\end{array}\begin{array}{c} x>0 \\ x<0\end{array} \right. ? Thankes, Omri

Thank you all! It was very helpful.

Hallo, I was wondering what is the physical significance of scalar field \Phi (x) as an quantum operator. \Phi (x) have canonical commutation relation such as [ \Phi (x) , \pi (x) ] so it must be an opertor, thus what are his eigenstates? Thanks, Omri

thanks bobm, the thing is i have word 2007 and mathtype 6 and i can't find the MathType tab in Word's Ribbon. is there anything else i can do?

Hallo everyone, I have a word document full of equations in Mathtype and I added a new equation which I wrote in different size and style. Does anyone know how I can change the old equations (not one by one) so their properties (size, style) would be exactly as those of the new equation...

Hallo, i would like to know why do we use the term free electron gas instead of Plasma? aren't both the same? thanks, Omri

I read to today that soap bubbles explodes due to surface tension regardless of other forces experienced on the bubble. how does surface tension does that? does it "drive" the bubble to go larger until it explodes? Thanks, Omri

i recommend on Arthur F kip book: http://www.amazon.com/dp/0070853819/?tag=pfamazon01-20 Omri

thanks for your reply. from your answer i don't understand what the diffrence between D and P?

thanks, that was very helpful :smile: omri

hey, i can't understand what is the motivation of defining pair of hole and electron as a single particle, exciton. thus they seem to have distinct motion and space. so why still we treat them as excitons?

Hallo everyone, in electrostatic we have a linear realation between E D and P, i do understand that P is related to the polaryzation density but what about E and D? which of those represent the overall field?

Thanks, It's working now, i really appreciate it! Omri

Hallo, I have matrices on my workpace and i need to take the first element from each one and produce new vector. In other words, i have the matrices D1,D2,D3...D36 on my workspace and by using a For loop i want to generate a new vector: d=[D1(1,1) D2(1,1)...D3(1,1)]. does anyone know how...