Herrero, A.; Ramírez, F. J.; Thome, N. An algorithm to study the nonnegativity, regularity and stability via state-feedbacks of singular systems of arbitrary index. (English) Zbl 1305.93079 Linear Multilinear Algebra 63, No. 5, 882-892 (2015). MSC: 93B52 15A09 93C05 93D99 PDFBibTeX XMLCite \textit{A. Herrero} et al., Linear Multilinear Algebra 63, No. 5, 882--892 (2015; Zbl 1305.93079) Full Text: DOI Link
Herrero, Alicia; Ramírez, Francisco J.; Thome, Néstor Relationships between different sets involving group and Drazin projectors and nonnegativity. (English) Zbl 1347.15010 Linear Algebra Appl. 438, No. 4, 1688-1699 (2013). MSC: 15A09 15B48 PDFBibTeX XMLCite \textit{A. Herrero} et al., Linear Algebra Appl. 438, No. 4, 1688--1699 (2013; Zbl 1347.15010) Full Text: DOI