Helena vSmigoc

activity

20132026

most citedAn extension of the Hermite-Biehler theorem with application to polynomials with one positive root

3 citations · 9 across the 11 of their papers we have counts for

collaborators

Showing 2018Show all

2 papers · 1 filter

math.SP2018

Diagonal realizability in the Nonnegative Inverse Eigenvalue Problem

Thomas J. Laffey, Helena Šmigoc

We show that if a list of nonzero complex numbers $σ = (λ_{1}, λ_{2}, \dots, λ_{k})$ is the nonzero spectrum of a diagonalizable nonnegative matrix, then $σ$ is the nonzero spectrum of a dia…

math.OC2018★ 2 cited

Integer completely positive matrices of order two

Thomas Laffey, Helena Šmigoc

We show that every integer doubly nonnegative $2 \times 2$ matrix has an integer cp-factorization.