On the mathematical representation of nonlinearity
Abstract
The suggestion of writing, for some problems, nonlinear state equations not as dx/dt = F(x,u,t), but as dx/dt = [A(t,x)]x + [B(t,x)]u(t), which is more "constructive", is considered supported by arguments related to: the axiomatization of system theory, the classification of switched circuits as linear and nonlinear, the use of nonlinear sampling for measuring frequency without clock, the consideration of an ensemble of colliding particles in which the establishing of the chaotic movements is seen as a result of the same kind of nonlinearity as in electronic switching circuits, the modeling of a liquid medium as a "system" whose structure is directly influenced by the "input", and some other problems.
Cite
@article{arxiv.0807.0966,
title = {On the mathematical representation of nonlinearity},
author = {Emanuel Gluskin},
journal= {arXiv preprint arXiv:0807.0966},
year = {2008}
}
Comments
36 pages, 6 figures. This is an elaborated presentation of my outlook on some concepts and problems of modern system theory which becomes more and more "nonlinear" because of the involvement of singular systems, and which should gradually become a part of one's basic education, just as it is with mathematics and physics. Dedicated to Ben-Zion Kaplan and Leon O. Chua