Abstract
Circular stability and unstability criteria for linear time-varying systems are formulated. They are applicable to verify the stability of linear systems for which the matrix in the right side have eigenvalues with positive real parts at certain specific time instants.
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Leonov, G.A. Circular Criteria for Linear Systems. Automation and Remote Control 62, 896–900 (2001). https://doi.org/10.1023/A:1010241518622
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DOI: https://doi.org/10.1023/A:1010241518622