Codereview: Implementing a joint differential equation and eigenvalue solver

Implementing a joint differential equation and eigenvalue solver
I hope you found a solution that worked for you :)
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Thanks to all those great people for their contributions!

(codereview.stackexchange.com/users/239760/amirhossein-rezaei)Amirhossein Rezaei
(codereview.stackexchange.com/users/25834/reinderien)Reinderien
A special thanks goes out to the (codereview.stackexchange.com/questions/294918/implementing-a-joint-differential-equation-and-eigenvalue-solver)Stackexchange community

I wish you all a wonderful day! Stay safe :)
If anything is off, please write me at peter D.O.T schneider A.T ois42.de

numpy python numerical-methods scipy matplotlib