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![enter image description here][1] Hello, I am trying to find the best solver for this problem described above. The equation is given in Mathematica commands: K1 = i; V = Tan[x]; P = r^2/(Cos[y])^5 eq =...
Hi, I have prepared the given NDSolve script for a third-order differential PDE: K1 = i; V = Tan[x]; P = r^2/(Cos[y])^5 eq = K1*r^3*D[u[r, y], {r, 3}] + r^2*D[u[r, y], {r, 2}] + r*K1*D[V^2*u[r, y], {r, 1}] +...
Hello, I would like to write the given PDE for NDSolve, ![enter image description here][1] with the given initial conditions: psi(r,0)=1 psi(0,phi)=0 psi'(r,0)=0 psi'(0,phi)=0 psi''(r,0)=10 psi''(0,phi)=10 How do I write that...
Hi, I have two ODE's, which list as: y = x' and y' = -i*b*x -c where b and c are exponential constants. How can I generate a phase portrait of this ODE in wolfram alpha? Thanks!