Arny Krueger wrote:


This is not debatable. Find a rigorous definition of linearity.


I think I just posted one.

I'll be on the lookout for that posting.


There are in fact several different definitions of nonlinear distortion,

If you say so but there is only one accepted definition of
linearity and it involves those pesky eigenfunctions and
eigenvalues. Stated in the vernacular it says that a linear
system is one in which no frequencies not in the input can
appear in the output for any possible input signal. All
other propeties of linear systems derive from that.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein