A Kharitonov region is a concept in mathematics. It arises in the study of the stability of polynomials. Let be a simply-connected set in the complex plane and let be the polynomial family. is said to be a Kharitonov region if is a subset of Here, denotes the set of all vertex polynomials of complex interval polynomials and denotes the set of all vertex polynomials of real interval polynomials See also Kharitonov's theorem References Y C Soh and Y K Foo (1991), “Kharitonov Regions: It Suffices to Check a Subset of Vertex Polynomials”, IEEE Trans. on Aut. Cont., 36, 1102 – 1105. Polynomials Mathematics