Cardoso, João R.; Ralha, Rui Matrix arithmetic-geometric mean and the computation of the logarithm. (English) Zbl 1338.65121 SIAM J. Matrix Anal. Appl. 37, No. 2, 719-743 (2016). MSC: 65F60 65F30 33E05 PDFBibTeX XMLCite \textit{J. R. Cardoso} and \textit{R. Ralha}, SIAM J. Matrix Anal. Appl. 37, No. 2, 719--743 (2016; Zbl 1338.65121) Full Text: DOI Link
Ralha, Tânia; Cabral Morais, Manuel; Rosário Oliveira, M. On valid signals in joint schemes for the process mean and variance. (English) Zbl 1390.62343 Econ. Qual. Control 30, No. 2, 99-110 (2015). MSC: 62P30 PDFBibTeX XMLCite \textit{T. Ralha} et al., Econ. Qual. Control 30, No. 2, 99--110 (2015; Zbl 1390.62343) Full Text: DOI
Liu, Zhongyun; Ralha, Rui; Zhang, Yulin; Ferreira, Carla Minimization problems for certain structured matrices. (English) Zbl 1328.65095 Electron. J. Linear Algebra 30, 613-631 (2015). MSC: 65F20 65F30 PDFBibTeX XMLCite \textit{Z. Liu} et al., Electron. J. Linear Algebra 30, 613--631 (2015; Zbl 1328.65095) Full Text: DOI Link
Liu, Zhongyun; Zhang, Yulin; Ferreira, Carla; Ralha, Rui Structure-preserving Schur methods for computing square roots of real skew-Hamiltonian matrices. (English) Zbl 1250.65055 Electron. J. Linear Algebra 23, 845-865 (2012). MSC: 65F15 65F30 15A18 PDFBibTeX XMLCite \textit{Z. Liu} et al., Electron. J. Linear Algebra 23, 845--865 (2012; Zbl 1250.65055) Full Text: arXiv Link
Liu, Zhongyun; Zhang, Yulin; Ferreira, C.; Ralha, Rui On inverse eigenvalue problems for block Toeplitz matrices with Toeplitz blocks. (English) Zbl 1192.65040 Appl. Math. Comput. 216, No. 6, 1819-1830 (2010). MSC: 65F18 15B05 PDFBibTeX XMLCite \textit{Z. Liu} et al., Appl. Math. Comput. 216, No. 6, 1819--1830 (2010; Zbl 1192.65040) Full Text: DOI Link
Campos, Carlos; Guerrero, David; Hernández, Vicente; Ralha, Rui Parallel bidiagonalization of a dense matrix. (English) Zbl 1145.65028 SIAM J. Matrix Anal. Appl. 29, No. 3, 826-837 (2007). MSC: 65F30 65Y05 15A21 PDFBibTeX XMLCite \textit{C. Campos} et al., SIAM J. Matrix Anal. Appl. 29, No. 3, 826--837 (2007; Zbl 1145.65028) Full Text: DOI
Loureiro Ralha, José Carlos; Ghedini Ralha, Célia Towards a natural way of reasoning. (English) Zbl 1105.68432 Bazzan, Ana L. C. (ed.) et al., Advances in artificial intelligence – SBIA 2004. 17th Brazilian symposium on artificial intelligence, São Luis, Maranhão, Brazil, September 29 – October 1, 2004. Proceedings. Berlin: Springer (ISBN 3-540-23237-0/pbk). Lecture Notes in Computer Science 3171. Lecture Notes in Artificial Intelligence, 114-123 (2004). MSC: 68T27 68T37 PDFBibTeX XMLCite \textit{J. C. Loureiro Ralha} and \textit{C. Ghedini Ralha}, Lect. Notes Comput. Sci. 3171, 114--123 (2004; Zbl 1105.68432) Full Text: DOI