The Unit Circle Cauchy Index: Definition, Characterization and Polynomial Zero Distribution

DOI10.1137/0144058zbMath0551.30007OpenAlexW1984496249MaRDI QIDQ3344422

Nozomu Hamada, Brian D. O. Anderson

Publication date: 1984

Published in: SIAM Journal on Applied Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1137/0144058

zbMATH Keywords

stability of discrete-time systemsstability of two-dimensional digital filtersunit circle Cauchy index

Mathematics Subject Classification ID

Discrete-time control/observation systems (93C55) Zeros of polynomials, rational functions, and other analytic functions of one complex variable (e.g., zeros of functions with bounded Dirichlet integral) (30C15) Polynomials and rational functions of one complex variable (30C10) Stability of control systems (93D99)

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