Concepts of feedback; open loop and closed loop systems. Feedback in electrical and mechanical systems. Mathematical models of systems and linear approximations. Transfer functions of linear systems, ...

This is a preview. Log in through your library . Abstract In some applications linear approximations to non-linear models are desirable. They bring the benefits of computational simplicity and access ...

Transactions of the American Mathematical Society, Vol. 347, No. 7 (Jul., 1995), pp. 2585-2594 (10 pages) We take an algebraic approach to the problem of approximation by dilated shifts of basis ...