Aspects of Stable Polynomials
نویسنده
چکیده
f(x1, . . . , xd) ∈ Ud (C) ⇐⇒ f(ıx1, . . . , ıxd) ∈ Hd(C) Consequently, many of the properties of H(C) follow immediately from the properties of U (C), and their proofs will be omitted. See [1–7, 13] for more information about U (C) and H(C). We use the notation in [7], and let RHP denote the right half plane. We do not cover well-known topics in one variable such as Routh-Hurwitz, the Edge theorem, and Kharitonov theory. See [11,12].
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