University of Guilan Journal of Mathematical Modeling 2345-394X 6 2 2018 12 01 Inverse eigenvalue problem of interval nonnegative matrices of order $\le 3$ 187 194 2962 10.22124/jmm.2018.10836.1171 EN Alimohammad Nazari Department of Mathematics, Arak university, Arak, Iran Maryam Zeinali Department of Mathematics, Shahid Rajaee University, Lavizan, Tehran, Iran Hamid Mesgarani Department of Mathematics, Shahid Rajaee University, Lavizan, Tehran, Iran Journal Article 2018 07 14 In this paper for a given set of real or complex interval numbers $\sigma$  satisfying  special conditions,  we find an interval nonnegative matrix  $C$ such that for each point set $\delta$  of given interval spectrum $\sigma$, there exists a point matrix $A$ of $C$ such that   $\delta$ is its spectrum. We also study some conditions for the  solution   existence of the problem. https://jmm.guilan.ac.ir/article_2962_a486c2238c47eb581d405624d3dce8d2.pdf