Loewy, Raphael Proof of a conjecture on polynomials preserving nonnegative matrices. (English) Zbl 1525.15013 Linear Algebra Appl. 676, 267-276 (2023). Reviewer: John D. Dixon (Ottawa) MSC: 15A29 15A18 15B48 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 676, 267--276 (2023; Zbl 1525.15013) Full Text: DOI arXiv
Loewy, Raphael; Spector, Oren Some notes on the spectra of nonnegative symmetric \(5\times 5\) matrices. (English) Zbl 1466.15015 Linear Multilinear Algebra 69, No. 7, 1363-1382 (2021). Reviewer: John D. Dixon (Ottawa) MSC: 15A29 15B48 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{O. Spector}, Linear Multilinear Algebra 69, No. 7, 1363--1382 (2021; Zbl 1466.15015) Full Text: DOI
Loewy, Raphael Some additional notes on the spectra of non-negative symmetric \(5 \times 5\) matrices. (English) Zbl 1465.15022 Electron. J. Linear Algebra 37, 1-13 (2021). MSC: 15A29 15A18 15A42 15A45 PDFBibTeX XMLCite \textit{R. Loewy}, Electron. J. Linear Algebra 37, 1--13 (2021; Zbl 1465.15022) Full Text: Link
Loewy, Raphael On the smallest singular value in the class of invertible lower triangular \((0,1)\) matrices. (English) Zbl 1476.15017 Linear Algebra Appl. 608, 203-213 (2021). Reviewer: Jorma K. Merikoski (Tampere) MSC: 15A18 11C20 15A42 15B36 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 608, 203--213 (2021; Zbl 1476.15017) Full Text: DOI
Loewy, Raphael; Spector, Oren A necessary condition for the spectrum of nonnegative symmetric \(5\times 5\) matrices. (English) Zbl 1398.15039 Linear Algebra Appl. 528, 206-272 (2017). MSC: 15B48 15A29 15A18 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{O. Spector}, Linear Algebra Appl. 528, 206--272 (2017; Zbl 1398.15039) Full Text: DOI arXiv
Loewy, Raphael A note on the real nonnegative inverse eigenvalue problem. (English) Zbl 1356.15003 Electron. J. Linear Algebra 31, 765-773 (2016). MSC: 15A18 15A29 15B48 PDFBibTeX XMLCite \textit{R. Loewy}, Electron. J. Linear Algebra 31, 765--773 (2016; Zbl 1356.15003) Full Text: DOI
Friedland, Shmuel; Loewy, Raphael On the extreme points of quantum channels. (English) Zbl 1334.15086 Linear Algebra Appl. 498, 553-573 (2016). MSC: 15B48 47B65 94A17 94A40 PDFBibTeX XMLCite \textit{S. Friedland} and \textit{R. Loewy}, Linear Algebra Appl. 498, 553--573 (2016; Zbl 1334.15086) Full Text: DOI arXiv
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
Loewy, Raphael On Faces of the set of Quantum Channels. arXiv:1609.05890 Preprint, arXiv:1609.05890 [quant-ph] (2016). MSC: 15B48 47B65 94A40 BibTeX Cite \textit{R. Loewy}, ``On Faces of the set of Quantum Channels'', Preprint, arXiv:1609.05890 [quant-ph] (2016) Full Text: arXiv OA License
Loewy, Raphael; Perles, Micha A.; Tam, Bit-Shun Maximal exponents of polyhedral cones. III. (English) Zbl 1343.15022 Trans. Am. Math. Soc. 365, No. 7, 3535-3573 (2013). MSC: 15B48 47A65 05C50 52B99 PDFBibTeX XMLCite \textit{R. Loewy} et al., Trans. Am. Math. Soc. 365, No. 7, 3535--3573 (2013; Zbl 1343.15022) Full Text: DOI
Loewy, Raphael Uriel G. Rothblum (1947-2012). (English) Zbl 1252.15001 Linear Algebra Appl. 437, No. 12, 2997-3009 (2012). MSC: 15-03 01A60 01A70 90-03 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 437, No. 12, 2997--3009 (2012; Zbl 1252.15001) Full Text: DOI
Loewy, Raphael On a nonnegative irreducible matrix that is similar to a positive matrix. (English) Zbl 1246.15033 Cent. Eur. J. Math. 10, No. 1, 303-311 (2012). Reviewer: Igor Klep (Auckland) MSC: 15B48 15A21 PDFBibTeX XMLCite \textit{R. Loewy}, Cent. Eur. J. Math. 10, No. 1, 303--311 (2012; Zbl 1246.15033) Full Text: DOI
Friedland, Shmuel; Loewy, Raphael On the minimum rank of a graph over finite fields. (English) Zbl 1241.05078 Linear Algebra Appl. 436, No. 6, 1710-1720 (2012). MSC: 05C50 15A03 11T99 PDFBibTeX XMLCite \textit{S. Friedland} and \textit{R. Loewy}, Linear Algebra Appl. 436, No. 6, 1710--1720 (2012; Zbl 1241.05078) Full Text: DOI arXiv
Hong, Shaofang; Loewy, Raphael Asymptotic behaviour of the smallest eigenvalue of matrices associated with completely even functions. (English) Zbl 1273.11052 Int. J. Number Theory 7, No. 6, 1681-1704 (2011). MSC: 11C20 11M41 11A05 15B36 PDFBibTeX XMLCite \textit{S. Hong} and \textit{R. Loewy}, Int. J. Number Theory 7, No. 6, 1681--1704 (2011; Zbl 1273.11052) Full Text: DOI arXiv
Loewy, Raphael; Tam, Bit-Shun Maximal exponents of polyhedral cones. II. (English) Zbl 1192.15014 Linear Algebra Appl. 432, No. 11, 2861-2878 (2010). MSC: 15B48 05C50 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{B.-S. Tam}, Linear Algebra Appl. 432, No. 11, 2861--2878 (2010; Zbl 1192.15014) Full Text: DOI
Loewy, Raphael; Tam, Bit-Shun Maximal exponents of polyhedral cones. I. (English) Zbl 1188.15027 J. Math. Anal. Appl. 365, No. 2, 570-583 (2010). MSC: 15B48 05C50 05C20 52A20 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{B.-S. Tam}, J. Math. Anal. Appl. 365, No. 2, 570--583 (2010; Zbl 1188.15027) 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.; Loewy, Raphael; Smith, Paul Anthony The graphs for which the maximum multiplicity of an eigenvalue is two. (English) Zbl 1225.05167 Linear Multilinear Algebra 57, No. 7, 713-736 (2009). MSC: 05C50 15A18 15B57 PDFBibTeX XMLCite \textit{C. R. Johnson} et al., Linear Multilinear Algebra 57, No. 7, 713--736 (2009; Zbl 1225.05167) Full Text: DOI arXiv
Barrett, Wayne; Hall, H. Tracy; Loewy, Raphael The inverse inertia problem for graphs: Cut vertices, trees, and a counterexample. (English) Zbl 1175.05032 Linear Algebra Appl. 431, No. 8, 1147-1191 (2009). MSC: 05C05 05C50 15A03 15B57 PDFBibTeX XMLCite \textit{W. Barrett} et al., Linear Algebra Appl. 431, No. 8, 1147--1191 (2009; Zbl 1175.05032) Full Text: DOI
Loewy, Raphael; Mehrmann, Volker A note on Potter’s theorem for quasi-commutative matrices. (English) Zbl 1177.15019 Linear Algebra Appl. 430, No. 7, 1812-1825 (2009). Reviewer: A. Arvanitoyeorgos (Patras) MSC: 15A27 15A24 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{V. Mehrmann}, Linear Algebra Appl. 430, No. 7, 1812--1825 (2009; Zbl 1177.15019) Full Text: DOI
Barrett, Wayne; Grout, Jason; Loewy, Raphael The minimum rank problem over the finite field of order 2: Minimum rank 3. (English) Zbl 1194.05080 Linear Algebra Appl. 430, No. 4, 890-923 (2009). MSC: 05C50 05C75 15A03 PDFBibTeX XMLCite \textit{W. Barrett} et al., Linear Algebra Appl. 430, No. 4, 890--923 (2009; Zbl 1194.05080) Full Text: DOI arXiv
Barrett, Wayne; Hall, H. Tracy; Loewy, Raphael The inverse inertia problem for graphs. arXiv:0711.3049 Preprint, arXiv:0711.3049 [math.CO] (2007). MSC: 05C05 05C50 15A03 15A57 BibTeX Cite \textit{W. Barrett} et al., ``The inverse inertia problem for graphs'', Preprint, arXiv:0711.3049 [math.CO] (2007) Full Text: arXiv
Berman, Abraham (ed.); Lerer, Leonid (ed.); Loewy, Raphael (ed.) Special issue devoted to the 13th Haifa conference on matrix theory proceedings, Haifa, Israel, January, 3–5, 2005. (English) Zbl 1099.15500 Linear Algebra Appl. 416, No. 1, 213 p. (2006). MSC: 15-06 00B25 PDFBibTeX XML
Barrett, Wayne; van der Holst, Hein; Loewy, Raphael Graphs whose minimal rank is two: the finite fields case. (English) Zbl 1102.05037 Electron. J. Linear Algebra 14, 32-42 (2005). Reviewer: Bert Randerath (Köln) MSC: 05C50 05C75 15A03 15B57 PDFBibTeX XMLCite \textit{W. Barrett} et al., Electron. J. Linear Algebra 14, 32--42 (2005; Zbl 1102.05037) Full Text: DOI EuDML EMIS Link
Hong, Shaofang; Loewy, Raphael Asymptotic behavior of eigenvalues of greatest common divisor matrices. (English) Zbl 1083.11021 Glasg. Math. J. 46, No. 3, 551-569 (2004). Reviewer: Pentti Haukkanen (Tampere) MSC: 11C20 15A18 15B36 PDFBibTeX XMLCite \textit{S. Hong} and \textit{R. Loewy}, Glasg. Math. J. 46, No. 3, 551--569 (2004; Zbl 1083.11021) Full Text: DOI
Barrett, Wayne; van der Holst, Hein; Loewy, Raphael Graphs whose minimal rank is two. (English) Zbl 1070.05059 Electron. J. Linear Algebra 11, 258-280 (2004). Reviewer: Heinz-Joachim Presia (Ilmenau) MSC: 05C50 05C75 15A03 15B57 PDFBibTeX XMLCite \textit{W. Barrett} et al., Electron. J. Linear Algebra 11, 258--280 (2004; Zbl 1070.05059) Full Text: DOI EuDML EMIS Link
Loewy, R.; McDonald, J. J. The symmetric nonnegative inverse eigenvalue problem for \(5 \times 5\) matrices. (English) Zbl 1066.15007 Linear Algebra Appl. 393, 275-298 (2004). Reviewer: Carlos Martins de Fonseca (Coimbra) MSC: 15A18 15A29 15B48 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{J. J. McDonald}, Linear Algebra Appl. 393, 275--298 (2004; Zbl 1066.15007) Full Text: DOI
Loewy, Raphael; Mehrmann, Volker A note on the symmetric recursive inverse eigenvalue problem. (English) Zbl 1062.15010 SIAM J. Matrix Anal. Appl. 25, No. 1, 180-187 (2003). MSC: 15A29 15A18 15B48 15B57 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{V. Mehrmann}, SIAM J. Matrix Anal. Appl. 25, No. 1, 180--187 (2003; Zbl 1062.15010) Full Text: DOI
Loewy, Raphael; Tam, Bit-Shun CP rank of completely positive matrices of order 5. (English) Zbl 1019.15009 Linear Algebra Appl. 363, 161-176 (2003). Reviewer: J.Zemánek (Warszawa) MSC: 15B48 15A23 15A03 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{B.-S. Tam}, Linear Algebra Appl. 363, 161--176 (2003; Zbl 1019.15009) Full Text: DOI
Berman, Avi (ed.); Elsner, Ludwig (ed.); Goldberg, Moshe (ed.); Loewy, Raphael (ed.) Proceedings of the ninth conference of the International Linear Algebra Society (ILAS), Haifa, Israel, June 25–29, 2001. (English) Zbl 1013.00513 Linear Algebra Appl. 361, 1-280 (2003). MSC: 00B25 15-06 PDFBibTeX XMLCite \textit{A. Berman} (ed.) et al., Linear Algebra Appl. 361, 1--280 (2003; Zbl 1013.00513) Full Text: DOI
Falikman, Dmitry; Friedland, Shmuel; Loewy, Raphael On spaces of matrices containing a nonzero matrix of bounded rank. (English) Zbl 1050.15018 Pac. J. Math. 207, No. 1, 157-176 (2002). MSC: 15A30 15A03 PDFBibTeX XMLCite \textit{D. Falikman} et al., Pac. J. Math. 207, No. 1, 157--176 (2002; Zbl 1050.15018) Full Text: DOI
Loewy, Raphael Large spaces of symmetric matrices of bounded rank are decomposable. (English) Zbl 0989.15006 Linear Multilinear Algebra 48, No. 4, 355-382 (2001). Reviewer: G.E.Wall (Sydney) MSC: 15A30 15A03 15B57 05C70 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Multilinear Algebra 48, No. 4, 355--382 (2001; Zbl 0989.15006) Full Text: DOI
Barrett, Wayne; Hall, H. Tracy; Loewy, Raphael The cone of class function inequalities for the \(4\)-by-\(4\) positive semidefinite matrices. (English) Zbl 1024.15008 Proc. Lond. Math. Soc., III. Ser. 79, No. 1, 107-130 (1999). MSC: 15B48 15A15 15A45 PDFBibTeX XMLCite \textit{W. Barrett} et al., Proc. Lond. Math. Soc. (3) 79, No. 1, 107--130 (1999; Zbl 1024.15008) Full Text: DOI
Barrett, Wayne; Hall, H. Tracy; Loewy, Raphael A nonpolyhedral cone of class function inequalities for positive semidefinite matrices. (English) Zbl 0959.15025 Linear Algebra Appl. 302-303, 535-553 (1999). Reviewer: Ali-Akbar Jafarian (West Haven) MSC: 15B48 15A45 15A15 PDFBibTeX XMLCite \textit{W. Barrett} et al., Linear Algebra Appl. 302--303, 535--553 (1999; Zbl 0959.15025) Full Text: DOI
Friedland, S.; Loewy, R. Spaces of symmetric matrices containing a nonzero matrix of bounded rank. (English) Zbl 0939.15009 Linear Algebra Appl. 287, No. 1-3, 161-170 (1999). Reviewer: Chen Zhijie (Shanghai) MSC: 15A30 15A03 PDFBibTeX XMLCite \textit{S. Friedland} and \textit{R. Loewy}, Linear Algebra Appl. 287, No. 1--3, 161--170 (1999; Zbl 0939.15009) Full Text: DOI
Barrett, Wayne W.; Johnson, Charles R.; Loewy, Raphael Critical graphs for the positive definite completion problem. (English) Zbl 0924.15020 SIAM J. Matrix Anal. Appl. 20, No. 1, 117-130 (1998). Reviewer: A.K.Lal (Kanpur) MSC: 15B48 05C75 05C50 PDFBibTeX XMLCite \textit{W. W. Barrett} et al., SIAM J. Matrix Anal. Appl. 20, No. 1, 117--130 (1998; Zbl 0924.15020) Full Text: DOI
Loewy, Raphael; Radwan, Nizar On spaces of matrices with a bounded number of eigenvalues. (English) Zbl 0913.15001 Electron. J. Linear Algebra 3, 142-152 (1998). Reviewer: S.E.Payne (Denver) MSC: 15A03 15A18 15A30 15A42 15A45 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{N. Radwan}, Electron. J. Linear Algebra 3, 142--152 (1998; Zbl 0913.15001) Full Text: DOI EuDML EMIS Link
Beasley, LeRoy B.; Loewy, Raphael Rank preservers on spaces of symmetric matrices. (English) Zbl 0890.15002 Linear Multilinear Algebra 43, No. 1-3, 63-86 (1997). Reviewer: A.K.Lal (Kanpur) MSC: 15A04 15B57 PDFBibTeX XMLCite \textit{L. B. Beasley} and \textit{R. Loewy}, Linear Multilinear Algebra 43, No. 1--3, 63--86 (1997; Zbl 0890.15002) Full Text: DOI
Loewy, R. An inertia theorem for Lyapunov’s equation and the dimension of a controllability space. (English) Zbl 0894.93018 Linear Algebra Appl. 260, 1-7 (1997). Reviewer: L.Rodman (Williamsburg) MSC: 93B60 15A24 93B05 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 260, 1--7 (1997; Zbl 0894.93018) 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
Johnson, Charles R.; Loewy, Raphael; Olesky, D. D.; van den Driesche, P. Maximizing the spectral radius of fixed trace diagonal perturbations of nonnegative matrices. (English) Zbl 0859.15004 Linear Algebra Appl. 241-243, 635-654 (1996). Reviewer: J.Szilasi (Debrecen) MSC: 15A42 15B48 PDFBibTeX XMLCite \textit{C. R. Johnson} et al., Linear Algebra Appl. 241--243, 635--654 (1996; Zbl 0859.15004) Full Text: DOI Link
Barrett, Wayne W.; Johnson, Charles R.; Loewy, Raphael The real positive definite completion problem: Cycle completability. (English) Zbl 0857.05068 Mem. Am. Math. Soc. 584, 69 p. (1996). Reviewer: S.Stahl (Lawrence) MSC: 05C50 05C75 15B48 05C38 PDFBibTeX XMLCite \textit{W. W. Barrett} et al., The real positive definite completion problem: Cycle completability. Providence, RI: American Mathematical Society (AMS) (1996; Zbl 0857.05068) Full Text: DOI
Loewy, Raphael; Pierce, Stephen Linear preservers of balanced nonsingular inertia classes. (English) Zbl 0833.15001 Linear Algebra Appl. 223-224, 483-499 (1995). Reviewer: Z.Dostál (Ostrava) MSC: 15A04 15A42 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{S. Pierce}, Linear Algebra Appl. 223--224, 483--499 (1995; Zbl 0833.15001) Full Text: DOI
Friedland, S. (ed.); Hershkowitz, D. (ed.); Loewy, R. (ed.) Proceedings of the workshop on nonnegative matrices, applications and generalizations, Haifa, Israel, 31 May-4 June, 1993 and the 8th Haifa matrix theory conference, Haifa, Israel, June 7-10, 1993. (English) Zbl 0819.00014 Linear Algebra Appl. 220, 433 p. (1995). MSC: 00B25 15-06 PDFBibTeX XMLCite \textit{S. Friedland} (ed.) et al., Linear Algebra Appl. 220, 433 p. (1995; Zbl 0819.00014) Full Text: DOI
Drew, John H.; Johnson, Charles R.; Loewy, Raphael Completely positive matrices associated with \(M\)-matrices. (English) Zbl 0815.15019 Linear Multilinear Algebra 37, No. 4, 303-310 (1994). Reviewer: G.Bonanno (Davis) MSC: 15B48 PDFBibTeX XMLCite \textit{J. H. Drew} et al., Linear Multilinear Algebra 37, No. 4, 303--310 (1994; Zbl 0815.15019) Full Text: DOI
Loewy, Raphael; Pierce, Stephen Linear preservers of balanced singular inertia classes. (English) Zbl 0805.15011 Linear Algebra Appl. 201, 61-77 (1994). Reviewer: K.Burian (Havířov) MSC: 15A42 15A04 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{S. Pierce}, Linear Algebra Appl. 201, 61--77 (1994; Zbl 0805.15011) Full Text: DOI
Loewy, Raphael; Radwan, Nizar Spaces of symmetric matrices of bounded rank. (English) Zbl 0801.15011 Linear Algebra Appl. 197-198, 189-215 (1994). Reviewer: N.Backhouse (Liverpool) MSC: 15A30 15A03 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{N. Radwan}, Linear Algebra Appl. 197--198, 189--215 (1994; Zbl 0801.15011) Full Text: DOI
Loewy, Raphael Linear mappings which are rank-\(k\) nonincreasing. II. (English) Zbl 0808.15004 Linear Multilinear Algebra 36, No. 2, 115-123 (1993). Reviewer: H.-J.Kowalsky (Braunschweig) MSC: 15A04 15A03 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Multilinear Algebra 36, No. 2, 115--123 (1993; Zbl 0808.15004) Full Text: DOI
Loewy, Raphael Linear mappings which are rank-\(k\) nonincreasing. (English) Zbl 0801.15002 Linear Multilinear Algebra 34, No. 1, 21-32 (1993). Reviewer: H.-J.Kowalsky (Braunschweig) MSC: 15A04 15A03 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Multilinear Algebra 34, No. 1, 21--32 (1993; Zbl 0801.15002) Full Text: DOI
Barrett, Wayne; Johnson, Charles R.; Loewy, Raphael; Shalom, Tamir Rank incrementation via diagonal perturbations. (English) Zbl 0837.15002 Brualdi, Richard A. (ed.) et al., Combinatorial and graph-theoretical problems in linear algebra. Proceedings of a workshop that was an integral part of the 1991-92 IMA program on “Applied Linear Algebra” held at the University of Minnesota, USA, November 11-15, 1991. New York: Springer-Verlag. IMA Vol. Math. Appl. 50, 181-187 (1993). Reviewer: P.M.Gibson (Huntsville) MSC: 15A03 PDFBibTeX XMLCite \textit{W. Barrett} et al., IMA Vol. Math. Appl. 50, 181--187 (1993; Zbl 0837.15002)
Baruch, Ehud Moshe; Loewy, Raphael Linear preservers on spaces of Hermitian or real symmetric matrices. (English) Zbl 0776.15007 Linear Algebra Appl. 183, 89-102 (1993). Reviewer: R.Covaci (Cluj-Napoca) MSC: 15A30 15B57 PDFBibTeX XMLCite \textit{E. M. Baruch} and \textit{R. Loewy}, Linear Algebra Appl. 183, 89--102 (1993; Zbl 0776.15007) Full Text: DOI
Hartwig, Robert E.; Loewy, Raphael Maximal elements under the three partial orders. (English) Zbl 0767.15017 Linear Algebra Appl. 175, 39-61 (1992). Reviewer: J.M.Day (San José) MSC: 15A60 15A45 06F25 47L07 46A40 PDFBibTeX XMLCite \textit{R. E. Hartwig} and \textit{R. Loewy}, Linear Algebra Appl. 175, 39--61 (1992; Zbl 0767.15017) Full Text: DOI
Grone, Robert; Loewy, Raphael; Pierce, Stephen Nonchordal positive semidefinite stochastic matrices. (English) Zbl 0754.15019 Linear Multilinear Algebra 32, No. 2, 107-113 (1992). Reviewer: R.Sinkhorn (Houston) MSC: 15B51 15A60 46A55 PDFBibTeX XMLCite \textit{R. Grone} et al., Linear Multilinear Algebra 32, No. 2, 107--113 (1992; Zbl 0754.15019) Full Text: DOI
Loewy, Raphael Inertia preservers. (English) Zbl 0766.15014 Linear Multilinear Algebra 33, No. 1-2, 23-30 (1992). Reviewer: H.Grassmann (Berlin) MSC: 15A30 15A18 16S50 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Multilinear Algebra 33, No. 1--2, 23--30 (1992; Zbl 0766.15014) Full Text: DOI
Loewy, R.; Shier, D. R.; Johnson, C. R. Perron eigenvectors and the symmetric transportation polytope. (English) Zbl 0762.15011 Linear Algebra Appl. 150, 139-155 (1991). Reviewer: V.Pták MSC: 15B48 15A18 52B11 52B12 PDFBibTeX XMLCite \textit{R. Loewy} et al., Linear Algebra Appl. 150, 139--155 (1991; Zbl 0762.15011) Full Text: DOI
Johnson, Charles R.; Loewy, Raphael Possible inertias for the Hermitian part of \(A+BX\). (English) Zbl 0725.15008 Linear Multilinear Algebra 28(1990), No. 4, 225-227 (1991). Reviewer: Min-Yen Wu (Boulder) MSC: 15A18 93D05 15B51 15A63 PDFBibTeX XMLCite \textit{C. R. Johnson} and \textit{R. Loewy}, Linear Multilinear Algebra 28, No. 4, 225--227 (1991; Zbl 0725.15008) Full Text: DOI
Loewy, Raphael Linear maps which preserve a balanced nonsingular inertia class. (English) Zbl 0706.15025 Linear Algebra Appl. 134, 165-179 (1990). Reviewer: L.Rodman MSC: 15B57 15A18 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 134, 165--179 (1990; Zbl 0706.15025) 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
Loewy, Raphael Linear maps that preserve an inertia class. (English) Zbl 0697.15003 SIAM J. Matrix Anal. Appl. 11, No. 1, 107-112 (1990). Reviewer: G.P.Barker MSC: 15A04 15B57 15A30 PDFBibTeX XMLCite \textit{R. Loewy}, SIAM J. Matrix Anal. Appl. 11, No. 1, 107--112 (1990; Zbl 0697.15003) Full Text: DOI
Loewy, Raphael On faces generated by certain positive linear transformations. (English) Zbl 0679.15016 Linear Algebra Appl. 118, 95-106 (1989). Reviewer: T.B.Andersen MSC: 15A30 15A60 15A04 47L07 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 118, 95--106 (1989; Zbl 0679.15016) Full Text: DOI
Loewy, Raphael Linear transformations which preserve or decrease rank. (English) Zbl 0678.15001 Linear Algebra Appl. 121, 151-161 (1989). Reviewer: H.-J.Kowalsky MSC: 15A04 15A03 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 121, 151--161 (1989; Zbl 0678.15001) Full Text: DOI
Loewy, Raphael Dimension of faces generated by certain positive linear operators. (English) Zbl 0658.15011 Linear Algebra Appl. 105, 199-207 (1988). Reviewer: A.A.Jafarian MSC: 15A30 15B48 15A45 06F20 15A03 15A04 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 105, 199--207 (1988; Zbl 0658.15011) Full Text: DOI
Loewy, R. On determinants of nonprincipal submatrices of Hermitian matrices. (English) Zbl 0629.15002 Linear Multilinear Algebra 20, 219-228 (1987). Reviewer: P.Rudra MSC: 15A15 15A45 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Multilinear Algebra 20, 219--228 (1987; Zbl 0629.15002) Full Text: DOI
Loewy, Raphael Diagonal similarity of matrices. (English) Zbl 0599.15004 Port. Math. 43(1985/86), 55-59 (1986). Reviewer: A.Mandel MSC: 15A21 05B35 05C50 PDFBibTeX XMLCite \textit{R. Loewy}, Port. Math. 43, 55--59 (1986; Zbl 0599.15004) Full Text: EuDML
Loewy, Raphael Principal minors and diagonal similarity of matrices. (English) Zbl 0591.15005 Linear Algebra Appl. 78, 23-64 (1986). Reviewer: M.Voicu MSC: 15A21 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 78, 23--64 (1986; Zbl 0591.15005) Full Text: DOI
Loewy, Raphael Two matrices which have equal corresponding principal minors. (English) Zbl 0578.15005 Linear algebra and its role in systems theory, Proc. AMS-IMS-SIAM Conf., Brunswick/Maine 1984, Contemp. Math. 47, 299-301 (1985). Reviewer: P.Metzger MSC: 15A21 15A15 PDFBibTeX XML
Carlson, David; Loewy, Raphael On equality of maps induced by tensor and symmetric products. (English) Zbl 0561.15013 Linear Multilinear Algebra 17, 87-100 (1985). Reviewer: V.L.Popov MSC: 15A72 15A03 PDFBibTeX XMLCite \textit{D. Carlson} and \textit{R. Loewy}, Linear Multilinear Algebra 17, 87--100 (1985; Zbl 0561.15013) Full Text: DOI
Hartfiel, D. J.; Loewy, Raphael A determinantal version of the Frobenius-König theorem. (English) Zbl 0551.15002 Linear Multilinear Algebra 16, 155-166 (1984). Reviewer: W.Wiȩsław MSC: 15A21 15A15 15B33 PDFBibTeX XMLCite \textit{D. J. Hartfiel} and \textit{R. Loewy}, Linear Multilinear Algebra 16, 155--166 (1984; Zbl 0551.15002) Full Text: DOI
Hartfiel, D. J.; Loewy, R. On matrices having equal corresponding principal minors. (English) Zbl 0541.15005 Linear Algebra Appl. 58, 147-167 (1984). Reviewer: Yueh-er Kuo MSC: 15A21 PDFBibTeX XMLCite \textit{D. J. Hartfiel} and \textit{R. Loewy}, Linear Algebra Appl. 58, 147--167 (1984; Zbl 0541.15005) Full Text: DOI
Loewy, R. Determinants of nonprincipal submatrices of positive semidefinite matrices. (English) Zbl 0523.15009 Linear Algebra Appl. 56, 1-16 (1984). MSC: 15A15 15B57 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 56, 1--16 (1984; Zbl 0523.15009) Full Text: DOI
Ballantine, C. S.; Loewy, R. Self-duality results for unitary and hermitian matrices. (English) Zbl 0516.15023 Linear Multilinear Algebra 13, 221-230 (1983). MSC: 15B57 15A18 15A15 PDFBibTeX XMLCite \textit{C. S. Ballantine} and \textit{R. Loewy}, Linear Multilinear Algebra 13, 221--230 (1983; Zbl 0516.15023) Full Text: DOI
Loewy, Raphael Determinants of nonprincipal submatrices of normal matrices. (English) Zbl 0516.15022 Linear Algebra Appl. 52-53, 497-507 (1983). MSC: 15B57 15A15 15A42 15A45 15A18 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 52--53, 497--507 (1983; Zbl 0516.15022) Full Text: DOI
Carlson, David; Loewy, Raphael On equality of maps induced by alternate products. (English) Zbl 0491.15003 Linear Algebra Appl. 47, 89-100 (1982). MSC: 15A69 PDFBibTeX XMLCite \textit{D. Carlson} and \textit{R. Loewy}, Linear Algebra Appl. 47, 89--100 (1982; Zbl 0491.15003) Full Text: DOI
Carlson, David; Loewy, Raphael Induced bilinear maps and matrix equations. (English) Zbl 0444.15013 Linear Multilinear Algebra 9, 17-33 (1980). MSC: 15A69 15A24 PDFBibTeX XMLCite \textit{D. Carlson} and \textit{R. Loewy}, Linear Multilinear Algebra 9, 17--33 (1980; Zbl 0444.15013) Full Text: DOI
Loewy, Raphael Quadratic forms on completely symmetric spaces. (English) Zbl 0431.15021 Linear Algebra Appl. 29, 211-216 (1980). MSC: 15A72 15A15 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 29, 211--216 (1980; Zbl 0431.15021) Full Text: DOI
Loewy, R. Extreme points of a convex subset of the cone of positive semidefinite matrices. (English) Zbl 0426.46008 Math. Ann. 253, 227-232 (1980). MSC: 46A55 46A50 15B57 15A30 PDFBibTeX XMLCite \textit{R. Loewy}, Math. Ann. 253, 227--232 (1980; Zbl 0426.46008) Full Text: DOI EuDML
Avraham, Sara; Loewy, Raphael On the inertia of the Lyapunov transform \(AH\) + \(HA^*\) for \(H>O\). (English) Zbl 0388.15009 Linear Multilinear Algebra 6, 1-21 (1978). MSC: 15A18 15A24 PDFBibTeX XMLCite \textit{S. Avraham} and \textit{R. Loewy}, Linear Multilinear Algebra 6, 1--21 (1978; Zbl 0388.15009) Full Text: DOI
Loewy, Raphael; London, David A note on an inverse problem for nonnegative matrices. (English) Zbl 0376.15006 Linear Multilinear Algebra 6, 83-90 (1978). MSC: 15A18 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{D. London}, Linear Multilinear Algebra 6, 83--90 (1978; Zbl 0376.15006) Full Text: DOI
Friedland, S.; Loewy, R. Subspaces of symmetric matrices containing matrices with a multiple first eigenvalue. (English) Zbl 0355.15003 Pac. J. Math. 62, 389-399 (1976). MSC: 15A03 15B48 15B57 15A18 PDFBibTeX XMLCite \textit{S. Friedland} and \textit{R. Loewy}, Pac. J. Math. 62, 389--399 (1976; Zbl 0355.15003) Full Text: DOI
Loewy, Raphael On ranges of real Lyapunov transformations. (English) Zbl 0337.15013 Linear Algebra Appl. 13, 79-89 (1976). MSC: 15A24 15A30 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 13, 79--89 (1976; Zbl 0337.15013) Full Text: DOI
Loewy, Raphael On ranges of Lyapunov transformations. IV. (English) Zbl 0337.15012 Glasg. Math. J. 17, 112-118 (1976). MSC: 15A24 15A30 15B57 PDFBibTeX XMLCite \textit{R. Loewy}, Glasg. Math. J. 17, 112--118 (1976; Zbl 0337.15012) Full Text: DOI
Loewy, Raphael On ranges of Lyapunov transformations. III. (English) Zbl 0337.15011 SIAM J. appl. Math. 30, 687-702 (1976). MSC: 15A24 15A30 15B57 PDFBibTeX XMLCite \textit{R. Loewy}, SIAM J. Appl. Math. 30, 687--702 (1976; Zbl 0337.15011) Full Text: DOI
Barker, George Philip; Loewy, Raphael The structure of cones of matrices. (English) Zbl 0314.15009 Linear Algebra Appl. 12, 87-94 (1975). MSC: 15B48 06F20 52A20 PDFBibTeX XMLCite \textit{G. P. Barker} and \textit{R. Loewy}, Linear Algebra Appl. 12, 87--94 (1975; Zbl 0314.15009) Full Text: DOI
Loewy, Raphael; Schneider, Hans Positive operators on the \(n\)-dimensional ice cream cone. (English) Zbl 0308.15011 J. Math. Anal. Appl. 49, 375-392 (1975). MSC: 15B48 47L07 PDFBibTeX XMLCite \textit{R. Loewy} and \textit{H. Schneider}, J. Math. Anal. Appl. 49, 375--392 (1975; Zbl 0308.15011) Full Text: DOI
Loewy, Raphael On ranges of Lyapunov transformations. II. (English) Zbl 0296.15008 Linear Multilinear Algebra 2, 227-237 (1974). MSC: 15A24 15A42 15B57 PDFBibTeX XML Full Text: DOI
Carlson, David; Loewy, Raphael On ranges of Lyapunov transformations. (English) Zbl 0284.15013 Linear Algebra Appl. 8, 237-248 (1974). MSC: 15A24 15A42 15B57 PDFBibTeX XMLCite \textit{D. Carlson} and \textit{R. Loewy}, Linear Algebra Appl. 8, 237--248 (1974; Zbl 0284.15013) Full Text: DOI
Loewy, Raphael The minimal eigenvalue of the Lyapunov transform. (English) Zbl 0276.15023 Linear Multilinear Algebra 1, 213-229 (1973). MSC: 15A42 93D05 PDFBibTeX XML Full Text: DOI
Loewy, R. On a theorem about the location of eigenvalues of matrices. (English) Zbl 0219.15007 Linear Algebra Appl. 4, 233-242 (1971). MSC: 15A18 PDFBibTeX XMLCite \textit{R. Loewy}, Linear Algebra Appl. 4, 233--242 (1971; Zbl 0219.15007) Full Text: DOI
Loewy, Raphael Gerschgorin-type theorems for partitioned matrices. (English) Zbl 0205.32902 SIAM J. Numer. Anal. 7, 125-128 (1970). MSC: 15A18 PDFBibTeX XMLCite \textit{R. Loewy}, SIAM J. Numer. Anal. 7, 125--128 (1970; Zbl 0205.32902) Full Text: DOI