Article
Keywords:
Hurwitz polynomials; expository paper; Hurwitz-Routh criterion; stable polynomial; Hermite; decompositon of Schur
Summary:
The article is a survey on problem of the theorem of Hurwitz. The starting point of explanations is Schur's decomposition theorem for polynomials. It is showed how to obtain the well-known criteria on the distribution of roots of polynomials. The theorem on uniqueness of constants in Schur's decomposition seems to be new.
References:
[1] Ch. Hermite: Sur le nombre des racines d'une équation algébrique comprises entre des limites données. Crelles J. 52, 39 (1856).
[2] J. Routh: A treatise on the stability of a given state of motion. London 1877.
[4] J. Schur:
Über die algebraischen Gleichungen, die nur Wurzeln mit negativen Realteilen besitzen. Z. angew. Math. Mech, 1, 307 (1921).
DOI 10.1002/zamm.19210010405
[5] L. S. Pontryagin:
On the zeros of some elementary transcendental functions. (Russian) Izv. Ak. Nauk SSSR, Ser. Mat. 6 (1942), 115-134. English Translation: Amer. Math. Soc. Transl. (2) 1 (1955), 95-110.
MR 0073686 |
Zbl 0068.05803
[6] H. Cremer F. H. Effertz:
Über die algebraischen Kriterien für die Stabilität von Regulungsystemen. Math. Ann. 137 (1959), 328-350.
DOI 10.1007/BF01360969 |
MR 0104684
[8] F. R. Gantmacher:
Theory of Matrices. (Russian) Izd. Nauka, Moskva 1966.
MR 0202725
[9] B. P. Demidowich:
Lectures on the Mathematical Theory of Stability. (Russian) Izd. Nauka, Moskva 1967.
MR 0226126