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This principle is the basis for the Nyquist stability criterion in classical control systems theory. #Math #ControlSystems #Engineering
𝘛𝘪𝘮 𝘛𝘦𝘢𝘵𝘳o@timtro
Illustrated: Cauchy's Argument Principle. The hue of each pixel represents the complex argument. A complex rational function is pictured left, and the right is the output plane. Count encirclements of the origin (right) as contours are drawn around poles and zeros (left)
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