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Unable to find explicit solution

Asked by tree spring on 7 Apr 2019
Latest activity Answered by Torsten
on 8 Apr 2019

  2 Comments

post code instead of picture
A picture may be worth a thousand words. But a picture of words? Worth far less. Even worse, a picture of tiny words, so small as to be invisible to the eye without an electron microscope? Totally worthless.
That something we cannot determine was unable to find a specific solution may just mean that a solution exists, but it could not find it. Or it may mean that no solution can ever be found using mathematics. Or it may mean that you did something totally incorrect. Or it may mean that while you are trying to solve some entirely reasonable problem, you are using some unspecified solver in the wrong way.
So if you want serious help, you need to show what it is that you tried to solve, and how you tried to solve it. Show the code. Not as a picture, since that would force someone to type in your code from the picture. But you figured out how to insert a picture. Surely inserting TEXT would have been easier?

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1 Answer

Answer by Torsten
on 8 Apr 2019

The message says that your differential equation is too complicated to get an explicit expression as solution.
Try a numerical integrator instead, e.g. ODE 45.

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