|Maxima source code is available.|
Here is the text for the challenge/task:
In my other blog post I described a case (screenshot 7) where a function z = f(x, y) has a minimum which just touches the plane z = 0. I made a cross section through the 3D surface, giving a function z = f(x), the equation of which is available in uploaded text files.
The function depends on a parameter L - the original length of the springs in the physical (federgraph) model, all other parameters are kept constant in the special sample.
Question: What exact value of L does correspond with the situation in screenshot 7 where the minimum touches the floor?
Not only do I want to know what the value of L is, I also would like to see how you approach the problem, what tricks you apply, and which software you use.
The Maxima source code is at pastebin.