Abstract
Electrical networks consisting of lumped linear and memoryless nonlinear elements and an arbitrary number of lossless transmission lines are considered. It is shown that a large class of such networks can be described by a system of functional-differential equations having the form\dot{x}(t) =f(x_{t}), where the state of the system at timet \geq 0is represented byx_{t}, a point in the spaceC_{H}((- \infty,0], E^{n})of bounded continuous functions mapping the interval(-\infty , 0]intoE^{n}, with the compact open topology, and the functionfmappingC_{H}(( - \infty, 0], E^{n})intoE^{n}is continuous and Lipschitzian. A Lyapunov functional is presented and used to obtain several theorems concerning the stability and instability of the equilibrium solution of such networks.

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