On nilpotent interval matrices

Document Type : Research Article

Authors

1 Faculty of Mathematical Sciences, University of Qom, Qom, Iran

2 School of Mathematics, Iran University of Science & Technology, Tehran , Iran

Abstract

In this paper, we give a necessary and sufficient condition for the powers of an interval matrix to be nilpotent. We show an interval matrix A is nilpotent if and only if ρ(B)=0, where B is a point matrix, introduced by Mayer (Linear Algebra Appl. 58 (1984) 201-216), constructed by the () property. We observed that the spectral radius, determinant, and trace of a nilpotent interval matrix equal zero but in general its converse is not true. Some properties of nonnegative nilpotent interval matrices are derived. We also show that an irreducible interval matrix A is nilpotent if and only if |A| is nilpotent.

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