Recent content by ilvreth

Hi to all. Say that you have an eigenvalue problem of a Hermitian matrix ##A## and want (for many reasons) to calculate the eigenvalues and eigenstates for many cases where only the diagonal elements are changed in each case. Say the common eigenvalue problem is ##Ax=λx##. The ##A## matrix is...

Hi to all! I need your opinion about something simple. All we know that in research "industry", in order to visualize their results, they extensively use originLab. Someone told me that "if you want to be called a researcher, then you have to learn origin...". Ok, fine. But I am a Linux...

Ok then, I just attempt another experiment which i resize the matrix C from (-2:2,1:2) to (-3:2,1:2) then run the code and you get zero C(-3,2) element. It is about how the memory works i guess. I think this is not a critical issue.

Hi to all. I am programing a new code for some calculation and i have detected a strange issue. I have my all arrays strictly defined for example real, dimension(-2:2,-3:2) A, B complex, dimension(-2:2,1:2) C In my time dependend calculations i expect the matrix element C(-2,1) to...

Oh, it was so easy finally.. Thank you!

Hi to all! Again I have a question in mathematica. Lets us define a system of equations e.q. eqs1 =-0.17544 Csc[\[Theta]]^2 + Sin[2 \[Phi]] == 0 && 0.001447 - 0.0864 Cos[\[Theta]] + 0.0288 Cos[\[Theta]]^3 == 0; and we want to find the solution by optimization with Reduce[{eqs1 && 0 <=...

Thanks for the reply! I ended up doing all my 3D graphics with PovRay. Is pretty awesome.

Hi to all. I want your opinion about which software is the most suitable for rendering 3D graphics in order to include these as figures in manuscripts, papers etc. I have seen many papers such as in Nature Physics, Nature Photonics etc that some 3D figures are really awesome. Especially, i...

Hi to all. These days i am working on a presentation using latex beamer. A really usefull thing is to present your animated graphs. I want to include some animated graphs in latex. I have some animated gif files but animated gif files are invalid in latex beamer. So i got some info...

Thank you very much! Seems you are expert in mathematica. :smile: Thank you again!

"Animate" & animated gif in Mathematica Hi to all. This period i am working on a project. I want to demonstrate the motion of a vector in 3D animation. I have a txt file with 4 columns and 8010 lines data. The first column is the time and the three other are the components of the vector in 3D...

So the final result is zero?

But the integral for t<-t1 and t>t1 gives zero (because the wavefunction is zero). Finally what the result is?

I know that. But the limit makes a confusion in my mind because T runs to infinity. Anyways. In my country is 4.48am and i am sleepless. Is result correct (the last step)?

How could you break an integral which is within a limit?