Subject: Is there any way to calculate the inflex point of a non linear system.

The inflex point of a system is the point where external forces are able to 
change the behavior of a system.  Being able to find this point will perhaps 
tell where the system will lter it's behavior and birfurcate.  This is likened 
to the load on a lever which can change the behavior of the leaver itself.  I 
am helping my friend who is working on an equasion to be able to predict the 
behavior of a non-linear system.  If he can find a way to find this "inflex 
point", he would have completed his equasion.  

Re: Is there any way to calculate the inflex point of a non linear system.