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New global exponential stability criteria for nonlinear delay differential systems with applications to BAM neural networks. (English) Zbl 1335.92007

Summary: We consider a nonlinear non-autonomous system with time-varying delays \[ \dot{x_i}(t) = - a_i(t) x_i(h_i(t)) + \sum_{j = 1}^m F_{ij} (t, x_j(g_{ij}(t))), \quad i = 1, \dots, m \] which has a large number of applications in the theory of artificial neural networks. Via the \(M\)-matrix method, easily verifiable sufficient stability conditions for the nonlinear system and its linear version are obtained. Application of the main theorem requires just to check whether a matrix, which is explicitly constructed using the system’s parameters, is an \(M\)-matrix. Comparison with the tests obtained by K. Gopalsamy [J. Math. Anal. Appl. 325, No. 2, 1117–1132 (2007; Zbl 1116.34058)] and B. Liu [Nonlinear Anal., Real World Appl. 14, No. 1, 559–566 (2013; Zbl 1260.34138)] for BAM neural networks illustrates novelty of the stability theorems. Some open problems conclude the paper.

MSC:

92B20 Neural networks for/in biological studies, artificial life and related topics
37N25 Dynamical systems in biology

References:

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