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On The Location of Eigenvalues of Matrix Polynomials

Authors: 

Cong Trinh Le, Thi-Hoa-Binh Du, Tran-Duc Nguyen

Source title: 
Operators and Matrices, 13(4): 937-954, 2019 (ISI)
Academic year of acceptance: 
2019-2020
Abstract: 

A number a is called an eigenvalue of the matrix polynomial P(z) if there exists a nonzero vector a such that P(λ)x = 0. Note that each finite eigenvalue of P(z) is a zero of the characteristic polynomial det(P(z)). In this paper we establish some (upper and lower) bounds for eigenvalues of matrix polynomials based on the norm of their coefficient matrices and compare these bounds to those given by N. J. Higham and F. Tisseur [8], J. Maroulas and P. Psarrakos [12].