Laffey, Thomas J.; Loewy, Raphael; Šmigoc, Helena Power series with positive coefficients arising from the characteristic polynomials of positive matrices. (English) Zbl 1345.15011 Math. Ann. 364, No. 1-2, 687-707 (2016). Reviewer: Alexander Kovačec (Coimbra); Frank Uhlig (Auburn) MSC: 15B48 15A29 15A18 30B10 37B10 PDFBibTeX XMLCite \textit{T. J. Laffey} et al., Math. Ann. 364, No. 1--2, 687--707 (2016; Zbl 1345.15011) Full Text: DOI arXiv
Laffey, Thomas J.; Loewy, Raphael; Šmigoc, Helena Nonnegative matrices that are similar to positive matrices. (English) Zbl 1190.15036 SIAM J. Matrix Anal. Appl. 31, No. 2, 629-649 (2009). Reviewer: Grozio Stanilov (Sofia) MSC: 15B48 15A04 PDFBibTeX XMLCite \textit{T. J. Laffey} et al., SIAM J. Matrix Anal. Appl. 31, No. 2, 629--649 (2009; Zbl 1190.15036) Full Text: DOI
Johnson, Charles R.; Laffey, Thomas J.; Loewy, Raphael The real and the symmetric nonnegative inverse eigenvalue problems are different. (English) Zbl 0861.15007 Proc. Am. Math. Soc. 124, No. 12, 3647-3651 (1996). MSC: 15A18 15B48 PDFBibTeX XMLCite \textit{C. R. Johnson} et al., Proc. Am. Math. Soc. 124, No. 12, 3647--3651 (1996; Zbl 0861.15007) Full Text: DOI
Laffey, Thomas J.; Loewy, Raphael Linear transformations which do not increase rank. (English) Zbl 0697.15004 Linear Multilinear Algebra 26, No. 3, 181-186 (1990). Reviewer: R.Ursianu MSC: 15A04 15A30 15A03 PDFBibTeX XMLCite \textit{T. J. Laffey} and \textit{R. Loewy}, Linear Multilinear Algebra 26, No. 3, 181--186 (1990; Zbl 0697.15004) Full Text: DOI