= Popov criterion
{wiki=Popov_criterion}
The Popov criterion is a mathematical condition used in control theory, particularly in the analysis and design of nonlinear control systems. It provides a way to determine the stability of a nonlinear system using a technique based on input-output relationships. The criterion is named after V. M. Popov, who developed the method for evaluating the stability of nonlinear dynamic systems characterized by a certain class of nonlinearities.
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