# User Portlet

Phil R
Discussions
Thank you David for having solved my problem, that example was really helpful for me. Now Mathematica creates the network graph. Regards Filippo
Hi everybody, I'm trying to solve analytically the wave equation in 1-D,2-D,3-D(I have already a numeric solution). I tried to solve it with the separation of variables mathod, but I can't get an acceptable solution. Could you help me please? Thank...
Thank you S M Blinder. Ok now I can solve the equation, but when i plot the result, it is totally different from which I obtain with NDSolveValue. What do you think about? Thank you Clear["Global`*"]; ...
Hi Ivan, k1 and m are two numeric variables. I tried to modify my code as you suggested and now it seems to work. That example was very useful. Thank you so much. There's only an issue: why if I change s step, the result is totally different? For...
Thank you Paritosh and Ivan. I have expressed L through p because of H(q,p,t)=Sum[q'[t]*p[t]] -L[q,p,t] so I wanted to solve my system in x,y,z,px,py,pz. "IndexReduction" should not be used, Mathematica gave me that suggestion because my code was...
Hi everyone, I'm trying to find the trajectory of an electron in a graphene lattice. I've a set of three differential equations in the three directions mx''=Fx,my''=Fy,mz''=Fz and i try to solve my system whith NDSolve and to plot the result, but...
Hi all, my name is Filippo. I'm an italian Electronic Engineer and I'm studying for my master degree at Calabria University. I need to use Wolfram Mathematica for academic purpose. I hope to find useful advices and examples which could help me to...