Here's the question you clicked on:
Mikael
\[ x^2 +x -1 =0 \] What is special about the solutions ?
and what are the solutions?
I just did an analysis of Yukawa potential orbits and coincidentally the positive solution to that is the threshold value of a parameter which governs whether there can be bound states .... but I suspect that's not what you're looking for.
golden ratio and it's reciprocal?
this is a ubiquitous number the Goden Ratio - is the threshhold between chaotic and Non-chaotic behaviour in KAM theory. Kolmogorov Arnold Moser
aren't they the ones that invented the back scratcher?