Application of complex symbolism to linear variable networks

THE APPLICATION of complex symbolism to linear fixed networks (i.e. networks governed by linear differential equations with constant coefficients) is effective by virtue of the fact that the principle of superposition is applicable to such networks. The same principle is applicable also to linear variable networks (i.e. networks governed by linear differential equations with coefficients that are dependent on time, but not on current or voltage). This suggests that it must also be possible to make use of the complex symbolism in the case of linear variable networks.