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| Thanks. I tried this as well, but it seems Mathematica is complaining about the same problem all the time: 0.00021449999999999998` cannot be used as a variable. what does that mean? |
| Hi, I have tried out this command to test the results: op = I*Nest[op, \[CapitalPsi][r, \[Phi]], 3] == 2 \[CapitalPsi][r, \[Phi]]*r^2/Cos[\[Phi]]^5 sol = CapitalPsi[r, Phi] /. NDSolve[{op, CapitalPsi[0, Phi]... |
| op = I*Nest[op, \[CapitalPsi][r, \[Phi]], 3] == 2 \[CapitalPsi][r, \[Phi]]*r^2/Cos[\[Phi]]^5 sol = u[r, y] /. NDSolve[{op, u[0, y] == 1, Derivative[1, 0][u][0, y] == 0, Derivative[2, 0][u][0, y] == 10, ... |
| I presume that it means I have to discard two of the three conditions related to u[r,0]=1 still I get an error of the same kind: K1 = i; V = Tan[x]; P = r^2/(Cos[y])^5 eq = K1*r^3*D[u[r, y], {r, 3}] +... |
| Hi, in order to solve the following ![enter image description here][1] I used : uval = ... |
| Thanks Michael. If you set b = c = 1 in: [ a, ib; 1, 1] it would give: [ a, ic; 1, 1] Did you include a? Can I try this command somehow? I have some experimental values for a and b. a would be 1^-68 and b would be 2^7. So a and b (c)... |