# User Portlet

Robert Poenaru
Discussions
Thank you again! This solution works like a charm! Best Regards
Well, you used cartesian coordinates. If I switch to the components x1, x2, and x3 which are expressed in terms of spherical coordinates, then the result I get is different.  ContourPlot3D[ a1 x1[r, \[Theta], \[Phi]]^2 + a2 x2[r,...
I must do a graphical representation of a surface which is expressed in spherical coordinates. For this, I saw that Mathematica has a straightforward method with the SphericalPlot3D` function. Having $x_1$, $x_2$ and $x_3$ in my code as the...
Hey Rohit, Thank you for your answer. I will definitely take a look at that. Also, thank you for the usefull link as well :)
Ooops...I see that there is no horizontal scroll here?! So my code doesn't show up properly on the page?
I am currently working on a topic involving nuclear theory (the study of deformed nuclei). So for the past two days, I've been trying to fit some data; I developed a theoretical model that aims at describing the energy spectrum of a nucleus. The...
Thank you. This works great!
I'm trying to compute various sums which contain some CB coefficients, where the sum runs over the indexes m1,m2,m corresponding to each of the three angular momenta j1,j2,j. The thing is that when I try to evaluate such a sum, Mathematica shows...