Nonlinear differential equations ?

Why don't you try sci.math. I am sure they would have all sorts of
examples.

Lurch

"Phil B Brubaker" wrote in message
...
Hi,

Are there any real-world nonlinear differential equations (DEs) that
still are not solved?

I'm writing a textbook on converting DE models used in simulating a
design or process. If one tweaks parameters until a 'best' solution
is found, these type problems make great examples for optimization.
Any leads to DE problems in industry that would be good examples?

Thanks,
Phil

Or, also, you could try sci.nonlinear.

Lurch

"Phil B Brubaker" wrote in message
...
Hi,

Are there any real-world nonlinear differential equations (DEs) that
still are not solved?

I'm writing a textbook on converting DE models used in simulating a
design or process. If one tweaks parameters until a 'best' solution
is found, these type problems make great examples for optimization.
Any leads to DE problems in industry that would be good examples?

Thanks,
Phil