Fig. 2. Three equivalent representations. Lemma C follows from Lemma A above and the block diagram equivalence indicated in Fig. 2. REFERENCES [ I 1 8. D. 0. Andenon, "Stability of control systems with multiple nonlinearities." 1. 121 M. Araki and B. Kondo. 'Stability and transient behawor of composite nonlinear Franklin Imr.. vol. 282. no. 3, pp. 155-160, 1966. systems,-I€€€ T o m . Aurornur. Conrr. (Short Papers). vol. AC-17. pp. 537-541. Aue. 1972. 131 F. Bailey, "The application of Liapunov's second method to interconnected sys-141 J. Blight "Scaler stability criteria for nonlinear multivanable feedback systems,-
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