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The feedback connection of a dynamical system and its dual, through nonlinear coupling elements, is shown to generate a pair of fundamental stationary principles. These provide a unified basis for both the classical Lagrangian and Hamiltonian treatments of dynamical systems aud modern work on nonlinear network theory and linear optimal-control theory.
Electrical Engineers, Proceedings of the Institution of (Volume:116 , Issue: 8 )
Date of Publication: August 1969