Edit Profile (opens in new tab) Hartwig, Robert E. Compute Distance To: Compute Author ID: hartwig.robert-e Published as: Hartwig, Robert E.; Hartwig, R. E.; Hartwig, Robert more...less Documents Indexed: 122 Publications since 1969 1 Contribution as Editor Co-Authors: 36 Co-Authors with 77 Joint Publications 819 Co-Co-Authors all top 5 Co-Authors 43 single-authored 12 Hall, Frank J. 12 Patrício, Pedro 6 Chen, Xuzhou 5 Bevis, Jean H. 5 Katz, Irving Jack 4 Levine, Jack 4 Luh, Jiang 4 Mani, Vaidyanath 3 Putcha, Mohan S. 3 Šemrl, Peter 3 Spindelböck, Klaus 3 Styan, George P. H. 2 Bapat, Ravindra Bhalchandra 2 Mitra, Sujit Kumar 2 Morris, S. Brent 2 Neumann, Michael 2 Puystjens, Roland 2 Wei, Yimin 1 Bérubé, Julie 1 Castro González, Nieves 1 Drazin, Michael P. 1 Fisher, Michael E. 1 Gabriel, Richard P. 1 Hartmann, Wolfgang M. 1 Kang, Min 1 Kirkland, Stephen J. 1 Li, Xiezhang 1 Loewy, Raphael 1 Maroulas, John 1 Newman, Morris 1 Omladič, Matjaž 1 Poplin, Phillip L. 1 Rose, Nicholas J. 1 Shoaf, James M. 1 Shoaf, Jim 1 Wang, Guorong all top 5 Serials 37 Linear Algebra and its Applications 12 Linear and Multilinear Algebra 7 SIAM Journal on Applied Mathematics 6 ELA. The Electronic Journal of Linear Algebra 5 Mathematica Japonica 5 Proceedings of the American Mathematical Society 4 Pacific Journal of Mathematics 4 Cryptologia 4 SIAM Journal on Matrix Analysis and Applications 3 Revue Roumaine de Mathématiques Pures et Appliquées 3 Industrial Mathematics 2 American Mathematical Monthly 2 Archive for Rational Mechanics and Analysis 2 Applied Mathematics and Computation 2 Journal of the Australian Mathematical Society 1 Discrete Mathematics 1 International Journal of Systems Science 1 Journal of Mathematical Analysis and Applications 1 Rocky Mountain Journal of Mathematics 1 Bulletin of the Calcutta Mathematical Society 1 Czechoslovak Mathematical Journal 1 Sankhyā. Series A. Methods and Techniques 1 Boletim da Sociedade Portuguesa de Matemática 1 Aequationes Mathematicae 1 Journal of the Australian Mathematical Society. Series A 1 SIAM Journal on Mathematical Analysis 1 SIAM Journal on Optimization 1 Numerical Linear Algebra with Applications 1 Operators and Matrices all top 5 Fields 97 Linear and multilinear algebra; matrix theory (15-XX) 22 Associative rings and algebras (16-XX) 12 Numerical analysis (65-XX) 9 Order, lattices, ordered algebraic structures (06-XX) 4 Systems theory; control (93-XX) 4 Information and communication theory, circuits (94-XX) 3 Combinatorics (05-XX) 3 Group theory and generalizations (20-XX) 3 Approximations and expansions (41-XX) 3 Computer science (68-XX) 2 Ordinary differential equations (34-XX) 2 Sequences, series, summability (40-XX) 2 Functional analysis (46-XX) 2 Operator theory (47-XX) 2 Statistics (62-XX) 1 General and overarching topics; collections (00-XX) 1 History and biography (01-XX) 1 Field theory and polynomials (12-XX) 1 Nonassociative rings and algebras (17-XX) 1 Difference and functional equations (39-XX) 1 Probability theory and stochastic processes (60-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 103 Publications have been cited 1,411 times in 925 Documents Cited by ▼ Year ▼ How to partially order regular elements. Zbl 0442.06006Hartwig, Robert E. 142 1980 Some additive results on Drazin inverse. Zbl 0967.15003Hartwig, Robert E.; Wang, Guorong; Wei, Yimin 107 2001 Block generalized inverses. Zbl 0335.15004Hartwig, Robert E. 78 1976 Representations for the Drazin inverse of a \(2 \times 2\) block matrix. Zbl 1100.15003Hartwig, Robert; Li, Xiezhang; Wei, Yimin 76 2006 On some characterizations of the ”star” partial ordering for matrices and rank subtractivity. Zbl 0603.15001Hartwig, Robert E.; Styan, George P. H. 62 1986 Group inverses and Drazin inverses of bidiagonal and triangular Toeplitz matrices. Zbl 0372.15003Hartwig, R. E.; Shoaf, J. 61 1977 The reverse order law revisited. Zbl 0584.15002Hartwig, R. E. 54 1986 The group inverse of a companion matrix. Zbl 0890.15003Puystjens, R.; Hartwig, R. E. 46 1997 A note on the group structure of unit regular ring elements. Zbl 0355.16005Hartwig, Robert E.; Luh, Jiang 37 1977 The matrix equation \(A\bar X-AB=C\) and its special cases. Zbl 0655.15013Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 36 1988 Matrices for which A* and A+ commute. Zbl 0525.15006Hartwig, Robert E.; Spindelboeck, Klaus 36 1983 Lattice properties of the *-order for complex matrices. Zbl 0485.15014Hartwig, Robert E.; Drazin, Michael P. 27 1982 Some additive results on Drazin inverses. Zbl 1182.65067Patrício, P.; Hartwig, R. E. 26 2009 More on the Souriau-Frame algorithm and the Drazin inverse. Zbl 0335.15008Hartwig, R. E. 26 1976 Determinantal identities over commutative semirings. Zbl 1057.15009Poplin, Phillip L.; Hartwig, Robert E. 25 2004 When is a matrix a sum of idempotents? Zbl 0696.15011Hartwig, Robert E.; Putcha, Mohan S. 24 1990 Asymptotic behavior of Toeplitz matrices and determinants. Zbl 0169.04403Hartwig, R. E.; Fisher, M. E. 24 1969 Partial orders based on outer inverses. Zbl 0778.15003Mitra, Sujit Kumar; Hartwig, Robert E. 24 1992 Applications of the Drazin inverse to the Hill cryptographic system. III. Zbl 0491.94015Hartwig, Robert E.; Levine, Jack 24 1981 On products of EP matrices. Zbl 0868.15015Hartwig, Robert E.; Katz, Irving J. 23 1997 Resultants and the solution of AX - XB = - C. Zbl 0222.15007Hartwig, Robert E. 21 1972 When is a matrix a difference of two idempotents? Zbl 0696.15010Hartwig, Robert E.; Putcha, Mohan S. 19 1990 The \((2,2,0)\) group inverse problem. Zbl 1204.15014Patrício, P.; Hartwig, R. E. 18 2010 Singular value decomposition and the Moore-Penrose inverse of bordered matrices. Zbl 0335.15006Hartwig, Robert E. 18 1976 A note on the partial ordering of positive semi-definite matrices. Zbl 0408.15015Hartwig, Robert E. 18 1978 The group inverse of a triangular matrix. Zbl 0851.15005Chen, Xuzhou; Hartwig, Robert E. 17 1996 Roth’s equivalence problem in unit regular rings. Zbl 0347.15005Hartwig, Robert E. 15 1976 The \((2,2,0)\) Drazin inverse problem. Zbl 1261.15008Patrício, P.; Hartwig, R. E. 14 2012 On finite regular rings. Zbl 0326.16012Hartwig, Robert E.; Luh, Jiang 14 1976 1-2 inverses and the invariance of \(BA^+C\). Zbl 0312.15001Hartwig, Robert E. 13 1975 Partial isometries, contractions and EP matrices. Zbl 0575.15008Hartwig, Robert E.; Spindelböck, Klaus 13 1983 The hyperpower iteration revisited. Zbl 0848.65021Chen, Xu-Zhou; Hartwig, Robert E. 11 1996 The link between regularity and strong-pi-regularity. Zbl 1204.15015Patrício, Pedro; Hartwig, R. E. 10 2010 Applications of the Drazin inverse to the Hill cryptographic system. I. Zbl 0427.94015Levine, Jack; Hartwig, Robert E. 10 1980 Roth’s removal rule revisited. Zbl 0509.15004Hartwig, Robert E. 10 1983 Bounds on the exponent of primitivity which depend on the spectrum and the minimal polynomial. Zbl 0790.15016Hartwig, Robert E.; Neumann, Michael 9 1993 Further results on generalized inverses of partitioned matrices. Zbl 0345.15005Hall, Frank J.; Hartwig, Robert E. 9 1976 A note on rank-additivity. Zbl 0456.15002Hartwig, Robert E. 8 1981 A method for calculating Drazin inverse of square matrix A. Zbl 0458.15002Hartwig, Robert E. 8 1981 Applications of the Drazin inverse to Cesaro-Neumann iterations. Zbl 0506.65016Hartwig, R. E.; Hall, F. J. 7 1982 Generalized polynomial bases and the Bézoutian. Zbl 0873.15016Mani, Vaidyanath; Hartwig, Robert E. 7 1997 Rank factorization and Moore-Penrose inversion. Zbl 0335.15005Hartwig, Robert E. 7 1976 On the derivative of the Drazin inverse of a complex matrix. Zbl 0401.15003Hartwig, Robert E.; Shoaf, Jim 7 1979 The resultant and the matrix equation AX = XB. Zbl 0243.15008Hartwig, Robert E. 6 1972 Semisimilarity for matrices over a division ring. Zbl 0467.15007Hartwig, Robert E.; Putcha, Mohan S. 6 1981 The universal flip matrix and the generalized faro-shuffle. Zbl 0316.15013Hartwig, Robert E.; Morris, S. Brent 6 1975 Generalized inverses, EP elements and associates. Zbl 0376.16012Hartwig, Robert E. 6 1978 Pseudo-similarity for matrices over a field. Zbl 0386.15013Hartwig, R. E.; Hall, F. J. 6 1978 Pseudo-similarity and partial unit regularity. Zbl 0544.15005Hall, Frank J.; Hartwig, Robert E.; Katz, Irving J.; Newman, Morris 6 1983 An algebraic-analytic approach to nonnegative bases. Zbl 0708.15003Hartwig, Robert E.; Neumann, Michael; Rose, Nicholas J. 5 1990 When does the Moore-Penrose inverse flip? Zbl 1241.15004Hartwig, R. E.; Patrício, P. 5 2012 An application of the Moore-Penrose inverse to antisymmetric relations. Zbl 0444.16005Hartwig, Robert E. 5 1980 Applications of the Wronskian and Gram matrices of \(\{t^ j \exp(\lambda_ k t)\}\). Zbl 0489.34023Hartwig, Robert E. 5 1982 On canonical correlations and the degrees of non-orthogonality in the three-way layout. Zbl 0858.62045Bérubé, Julie; Hartwig, Robert E.; Styan, George P. H. 5 1993 Some closed form formulae for the intersection of two special matrices under the star order. Zbl 0575.15009Hartwig, Robert E.; Spindelböck, Klaus 5 1983 Consimilarity and the matrix equation \(A\bar X-XB=C\). Zbl 0655.15012Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 4 1987 Pseudo lattice properties of the star-orthogonal partial ordering for star-regular rings. Zbl 0423.06013Hartwig, Robert E. 4 1979 AX-XB=C, resultants and generalized inverses. Zbl 0268.15004Hartwig, Robert E. 4 1975 On a theorem of Flanders. Zbl 0508.15008Hartwig, Robert E. 4 1982 The generalized faro shuffle. Zbl 0334.05034Morris, S. Brent; Hartwig, Robert E. 4 1976 Generalizations of the spectral theorem for matrices. II. Matrix polynomials over arbitrary fields. Zbl 0548.15026Hartwig, R. E. 4 1984 A remark on the characterization of the parallel sum of two matrices. Zbl 0638.15003Hartwig, Robert E. 3 1987 Note on a linear difference equation. Zbl 1132.39001Hartwig, Robert E. 3 2006 Maximal elements under the three partial orders. Zbl 0767.15017Hartwig, Robert E.; Loewy, Raphael 3 1992 Applications of the Drazin inverse to the Hill cryptographic system. IV. Zbl 0491.94016Hartwig, Robert E.; Levine, Jack 3 1981 Diagonalizing triangular matrices via orthogonal Pierce decompositions. Zbl 1074.15006Hartwig, R. E.; Patrício, P.; Puystjens, R. 3 2005 EP perturbations. Zbl 0835.15001Hartwig, Robert E. 3 1994 On some characterizations of pairwise star orthogonality using rank and dagger additivity and subtractivity. Zbl 0848.15013Hartwig, Robert E.; Omladič, Matjaž; Šemrl, Peter; Styan, George P. H. 3 1996 Products of EP elements in reflexive semigroups. Zbl 0329.20052Hartwig, Robert E.; Katz, Irving J. 3 1976 Schur’s theorem and the Drazin inverse. Zbl 0362.15003Hartwig, Robert E. 3 1978 The Drazin inverse as a gradient. Zbl 0562.15001Gabriel, Richard; Hartwig, Robert E. 3 1984 Invariance under outer inverses. Zbl 1390.15011Hartwig, R. E.; Patrício, P. 3 2018 Resultants, companion matrices, and Jacobson chains. Zbl 0622.15003Hartwig, Robert E. 2 1987 A note on light matrices. Zbl 0637.15016Hartwig, Robert E. 2 1987 Toeplitz determinants and Szegö’s formula. Zbl 0174.31604Hartwig, R. E. 2 1969 A note on Jacobson chains. Zbl 0222.15006Hartwig, Robert E. 2 1972 On Roth’s pseudo equivalence over rings. Zbl 1158.15009Hartwig, R. E.; Patricio, Pedro 2 2007 Invariance, group inverses and parallel sums. Zbl 0432.16009Hartwig, Robert E.; Shoaf, J. M. 2 1980 Applications of the Drazin inverse to the Hill cryptographic system. II. Zbl 0444.94012Levine, Jack; Hartwig, Robert E. 2 1980 Drazin inverses and canonical forms in \(M_ 0(\)Z/h). Zbl 0455.15003Hartwig, Robert E. 2 1981 The weighted \(*\)-core-nilpotent decomposition. Zbl 0813.15002Hartwig, Robert E. 2 1994 Duality and black box interpolation. I: The one variable nonderogatory case. Zbl 0853.15006Mani, Vaidyanath; Hartwig, Robert E. 2 1995 Spectral inverses and the row-space equations. Zbl 0388.15002Hartwig, Robert E. 2 1978 A note on periodic matrices. Zbl 0391.15004Hartwig, Robert E. 2 1977 A note on pseudo-similarity of matrices. Zbl 0398.15009Hall, Frank J.; Hartwig, Robert E.; Katz, Irving J. 2 1978 Theory and applications of matrix perturbations, with respect to Hankel matrices and power formulae. Zbl 0401.93021Hartwig, Robert E. 2 1979 Block striped and block nested matrices. Zbl 0592.15005Hartwig, R. E.; Hall, F. J.; Katz, I. J. 2 1985 Perturbation results and the forward order law for the Moore-Penrose inverse of a product. Zbl 1405.15007Castro-González, Nieves; Hartwig, Robert E. 2 2018 Pseudo-consimilarity and semi-consimilarity of complex matrices. Zbl 0629.15005Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 1 1987 The group inverse of a block triangular matrix. Zbl 0661.15003Hartwig, Robert E. 1 1987 A note on power bounded matrices. Zbl 1251.15016Hartwig, R. E.; Patricio, P. 1 2012 Algebraic properties of governing matrices used in Cesaro-Neumann iterations. Zbl 0468.65019Hall, Frank J.; Hartwig, Robert E. 1 1981 A convexity result for complex numbers with applications to nonnegative normal matrices. Zbl 0823.15019Kirkland, Steve; Hartwig, Robert E. 1 1995 Roth’s removal rule and the rational canonical form. Zbl 0861.15010Hartwig, Robert E. 1 1996 Computing the Moore-Penrose inverse for the covariance matrix in constrained nonlinear estimation. Zbl 0874.62069Hartmann, Wolfgang M.; Hartwig, Robert E. 1 1996 Power additivity and orthogonality. Zbl 0924.15007Hartwig, Robert E.; Šemrl, Peter 1 1998 Constrained convergence. Zbl 0930.65032Hartwig, Robert E.; Šemrl, Peter 1 1999 A note on the existence of inner and outer inverses. Zbl 0396.16006Hartwig, Robert E. 1 1978 Two by two units. Zbl 1327.15004Hartwig, R. E.; Patrício, P. 1 2014 The group inverse of the nivellateur. Zbl 1400.15008Hartwig, R. E.; Patrício, P. 1 2018 Invariance under outer inverses. Zbl 1390.15011Hartwig, R. E.; Patrício, P. 3 2018 Perturbation results and the forward order law for the Moore-Penrose inverse of a product. Zbl 1405.15007Castro-González, Nieves; Hartwig, Robert E. 2 2018 The group inverse of the nivellateur. Zbl 1400.15008Hartwig, R. E.; Patrício, P. 1 2018 Some regular sums. Zbl 1307.15008Patrício, P.; Hartwig, R. E. 1 2015 Two by two units. Zbl 1327.15004Hartwig, R. E.; Patrício, P. 1 2014 The \((2,2,0)\) Drazin inverse problem. Zbl 1261.15008Patrício, P.; Hartwig, R. E. 14 2012 When does the Moore-Penrose inverse flip? Zbl 1241.15004Hartwig, R. E.; Patrício, P. 5 2012 A note on power bounded matrices. Zbl 1251.15016Hartwig, R. E.; Patricio, P. 1 2012 The \((2,2,0)\) group inverse problem. Zbl 1204.15014Patrício, P.; Hartwig, R. E. 18 2010 The link between regularity and strong-pi-regularity. Zbl 1204.15015Patrício, Pedro; Hartwig, R. E. 10 2010 Some additive results on Drazin inverses. Zbl 1182.65067Patrício, P.; Hartwig, R. E. 26 2009 On Roth’s pseudo equivalence over rings. Zbl 1158.15009Hartwig, R. E.; Patricio, Pedro 2 2007 Representations for the Drazin inverse of a \(2 \times 2\) block matrix. Zbl 1100.15003Hartwig, Robert; Li, Xiezhang; Wei, Yimin 76 2006 Note on a linear difference equation. Zbl 1132.39001Hartwig, Robert E. 3 2006 The Picard iteration and its application. Zbl 1103.65034Chen, Xuzhou; Hartwig, Robert E. 1 2006 Diagonalizing triangular matrices via orthogonal Pierce decompositions. Zbl 1074.15006Hartwig, R. E.; Patrício, P.; Puystjens, R. 3 2005 Determinantal identities over commutative semirings. Zbl 1057.15009Poplin, Phillip L.; Hartwig, Robert E. 25 2004 Some additive results on Drazin inverse. Zbl 0967.15003Hartwig, Robert E.; Wang, Guorong; Wei, Yimin 107 2001 Constrained convergence. Zbl 0930.65032Hartwig, Robert E.; Šemrl, Peter 1 1999 Power additivity and orthogonality. Zbl 0924.15007Hartwig, Robert E.; Šemrl, Peter 1 1998 The group inverse of a companion matrix. Zbl 0890.15003Puystjens, R.; Hartwig, R. E. 46 1997 On products of EP matrices. Zbl 0868.15015Hartwig, Robert E.; Katz, Irving J. 23 1997 Generalized polynomial bases and the Bézoutian. Zbl 0873.15016Mani, Vaidyanath; Hartwig, Robert E. 7 1997 The group inverse of a triangular matrix. Zbl 0851.15005Chen, Xuzhou; Hartwig, Robert E. 17 1996 The hyperpower iteration revisited. Zbl 0848.65021Chen, Xu-Zhou; Hartwig, Robert E. 11 1996 On some characterizations of pairwise star orthogonality using rank and dagger additivity and subtractivity. Zbl 0848.15013Hartwig, Robert E.; Omladič, Matjaž; Šemrl, Peter; Styan, George P. H. 3 1996 Roth’s removal rule and the rational canonical form. Zbl 0861.15010Hartwig, Robert E. 1 1996 Computing the Moore-Penrose inverse for the covariance matrix in constrained nonlinear estimation. Zbl 0874.62069Hartmann, Wolfgang M.; Hartwig, Robert E. 1 1996 Duality and black box interpolation. I: The one variable nonderogatory case. Zbl 0853.15006Mani, Vaidyanath; Hartwig, Robert E. 2 1995 A convexity result for complex numbers with applications to nonnegative normal matrices. Zbl 0823.15019Kirkland, Steve; Hartwig, Robert E. 1 1995 EP perturbations. Zbl 0835.15001Hartwig, Robert E. 3 1994 The weighted \(*\)-core-nilpotent decomposition. Zbl 0813.15002Hartwig, Robert E. 2 1994 Bounds on the exponent of primitivity which depend on the spectrum and the minimal polynomial. Zbl 0790.15016Hartwig, Robert E.; Neumann, Michael 9 1993 On canonical correlations and the degrees of non-orthogonality in the three-way layout. Zbl 0858.62045Bérubé, Julie; Hartwig, Robert E.; Styan, George P. H. 5 1993 The pyramid decomposition and rank minimization. Zbl 0797.15013Hartwig, Robert E. 1 1993 Partial orders based on outer inverses. Zbl 0778.15003Mitra, Sujit Kumar; Hartwig, Robert E. 24 1992 Maximal elements under the three partial orders. Zbl 0767.15017Hartwig, Robert E.; Loewy, Raphael 3 1992 When is a matrix a sum of idempotents? Zbl 0696.15011Hartwig, Robert E.; Putcha, Mohan S. 24 1990 When is a matrix a difference of two idempotents? Zbl 0696.15010Hartwig, Robert E.; Putcha, Mohan S. 19 1990 An algebraic-analytic approach to nonnegative bases. Zbl 0708.15003Hartwig, Robert E.; Neumann, Michael; Rose, Nicholas J. 5 1990 The matrix equation \(A\bar X-AB=C\) and its special cases. Zbl 0655.15013Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 36 1988 Consimilarity and the matrix equation \(A\bar X-XB=C\). Zbl 0655.15012Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 4 1987 A remark on the characterization of the parallel sum of two matrices. Zbl 0638.15003Hartwig, Robert E. 3 1987 Resultants, companion matrices, and Jacobson chains. Zbl 0622.15003Hartwig, Robert E. 2 1987 A note on light matrices. Zbl 0637.15016Hartwig, Robert E. 2 1987 Pseudo-consimilarity and semi-consimilarity of complex matrices. Zbl 0629.15005Bevis, Jean H.; Hall, Frank J.; Hartwig, Robert E. 1 1987 The group inverse of a block triangular matrix. Zbl 0661.15003Hartwig, Robert E. 1 1987 On some characterizations of the ”star” partial ordering for matrices and rank subtractivity. Zbl 0603.15001Hartwig, Robert E.; Styan, George P. H. 62 1986 The reverse order law revisited. Zbl 0584.15002Hartwig, R. E. 54 1986 Block striped and block nested matrices. Zbl 0592.15005Hartwig, R. E.; Hall, F. J.; Katz, I. J. 2 1985 Generalizations of the spectral theorem for matrices. II. Matrix polynomials over arbitrary fields. Zbl 0548.15026Hartwig, R. E. 4 1984 The Drazin inverse as a gradient. Zbl 0562.15001Gabriel, Richard; Hartwig, Robert E. 3 1984 Matrices for which A* and A+ commute. Zbl 0525.15006Hartwig, Robert E.; Spindelboeck, Klaus 36 1983 Partial isometries, contractions and EP matrices. Zbl 0575.15008Hartwig, Robert E.; Spindelböck, Klaus 13 1983 Roth’s removal rule revisited. Zbl 0509.15004Hartwig, Robert E. 10 1983 Pseudo-similarity and partial unit regularity. Zbl 0544.15005Hall, Frank J.; Hartwig, Robert E.; Katz, Irving J.; Newman, Morris 6 1983 Some closed form formulae for the intersection of two special matrices under the star order. Zbl 0575.15009Hartwig, Robert E.; Spindelböck, Klaus 5 1983 Lattice properties of the *-order for complex matrices. Zbl 0485.15014Hartwig, Robert E.; Drazin, Michael P. 27 1982 Applications of the Drazin inverse to Cesaro-Neumann iterations. Zbl 0506.65016Hartwig, R. E.; Hall, F. J. 7 1982 Applications of the Wronskian and Gram matrices of \(\{t^ j \exp(\lambda_ k t)\}\). Zbl 0489.34023Hartwig, Robert E. 5 1982 On a theorem of Flanders. Zbl 0508.15008Hartwig, Robert E. 4 1982 Applications of the Drazin inverse to the Hill cryptographic system. III. Zbl 0491.94015Hartwig, Robert E.; Levine, Jack 24 1981 A note on rank-additivity. Zbl 0456.15002Hartwig, Robert E. 8 1981 A method for calculating Drazin inverse of square matrix A. Zbl 0458.15002Hartwig, Robert E. 8 1981 Semisimilarity for matrices over a division ring. Zbl 0467.15007Hartwig, Robert E.; Putcha, Mohan S. 6 1981 Applications of the Drazin inverse to the Hill cryptographic system. IV. Zbl 0491.94016Hartwig, Robert E.; Levine, Jack 3 1981 Drazin inverses and canonical forms in \(M_ 0(\)Z/h). Zbl 0455.15003Hartwig, Robert E. 2 1981 Algebraic properties of governing matrices used in Cesaro-Neumann iterations. Zbl 0468.65019Hall, Frank J.; Hartwig, Robert E. 1 1981 How to partially order regular elements. Zbl 0442.06006Hartwig, Robert E. 142 1980 Applications of the Drazin inverse to the Hill cryptographic system. I. Zbl 0427.94015Levine, Jack; Hartwig, Robert E. 10 1980 An application of the Moore-Penrose inverse to antisymmetric relations. Zbl 0444.16005Hartwig, Robert E. 5 1980 Invariance, group inverses and parallel sums. Zbl 0432.16009Hartwig, Robert E.; Shoaf, J. M. 2 1980 Applications of the Drazin inverse to the Hill cryptographic system. II. Zbl 0444.94012Levine, Jack; Hartwig, Robert E. 2 1980 On the derivative of the Drazin inverse of a complex matrix. Zbl 0401.15003Hartwig, Robert E.; Shoaf, Jim 7 1979 Pseudo lattice properties of the star-orthogonal partial ordering for star-regular rings. Zbl 0423.06013Hartwig, Robert E. 4 1979 Theory and applications of matrix perturbations, with respect to Hankel matrices and power formulae. Zbl 0401.93021Hartwig, Robert E. 2 1979 A note on the partial ordering of positive semi-definite matrices. Zbl 0408.15015Hartwig, Robert E. 18 1978 Generalized inverses, EP elements and associates. Zbl 0376.16012Hartwig, Robert E. 6 1978 Pseudo-similarity for matrices over a field. Zbl 0386.15013Hartwig, R. E.; Hall, F. J. 6 1978 Schur’s theorem and the Drazin inverse. Zbl 0362.15003Hartwig, Robert E. 3 1978 Spectral inverses and the row-space equations. Zbl 0388.15002Hartwig, Robert E. 2 1978 A note on pseudo-similarity of matrices. Zbl 0398.15009Hall, Frank J.; Hartwig, Robert E.; Katz, Irving J. 2 1978 A note on the existence of inner and outer inverses. Zbl 0396.16006Hartwig, Robert E. 1 1978 Group inverses and Drazin inverses of bidiagonal and triangular Toeplitz matrices. Zbl 0372.15003Hartwig, R. E.; Shoaf, J. 61 1977 A note on the group structure of unit regular ring elements. Zbl 0355.16005Hartwig, Robert E.; Luh, Jiang 37 1977 A note on periodic matrices. Zbl 0391.15004Hartwig, Robert E. 2 1977 Block generalized inverses. Zbl 0335.15004Hartwig, Robert E. 78 1976 More on the Souriau-Frame algorithm and the Drazin inverse. Zbl 0335.15008Hartwig, R. E. 26 1976 Singular value decomposition and the Moore-Penrose inverse of bordered matrices. Zbl 0335.15006Hartwig, Robert E. 18 1976 Roth’s equivalence problem in unit regular rings. Zbl 0347.15005Hartwig, Robert E. 15 1976 On finite regular rings. Zbl 0326.16012Hartwig, Robert E.; Luh, Jiang 14 1976 Further results on generalized inverses of partitioned matrices. Zbl 0345.15005Hall, Frank J.; Hartwig, Robert E. 9 1976 Rank factorization and Moore-Penrose inversion. Zbl 0335.15005Hartwig, Robert E. 7 1976 The generalized faro shuffle. Zbl 0334.05034Morris, S. Brent; Hartwig, Robert E. 4 1976 Products of EP elements in reflexive semigroups. Zbl 0329.20052Hartwig, Robert E.; Katz, Irving J. 3 1976 1-2 inverses and the invariance of \(BA^+C\). Zbl 0312.15001Hartwig, Robert E. 13 1975 The universal flip matrix and the generalized faro-shuffle. Zbl 0316.15013Hartwig, Robert E.; Morris, S. Brent 6 1975 AX-XB=C, resultants and generalized inverses. Zbl 0268.15004Hartwig, Robert E. 4 1975 Resultants and the solution of AX - XB = - C. Zbl 0222.15007Hartwig, Robert E. 21 1972 The resultant and the matrix equation AX = XB. Zbl 0243.15008Hartwig, Robert E. 6 1972 ...and 3 more Documents all cited Publications top 5 cited Publications all top 5 Cited by 721 Authors 54 Chen, Jianlong 51 Mosić, Dijana 50 Hartwig, Robert E. 42 Wei, Yimin 33 Liu, Xiaoji 32 Patrício, Pedro 30 Cvetković-Ilić, Dragana S. 30 Deng, Chunyuan 30 Đorđević, Dragan S. 24 Tian, Yongge 21 Baksalary, Jerzy K. 16 Marovt, Janko 16 Wu, Aiguo 15 Baksalary, Oskar Maria 15 Duan, Guangren 14 Trenkler, Götz 13 Bu, Changjiang 13 Gross, Jürgen 13 Mitra, Sujit Kumar 13 Zou, Honglin 12 Chen, Huanyin 12 Thome, Néstor 12 Wang, Qingwen 11 Guterman, Alexander Èmilevich 11 Mary, Xavier 11 Wang, Hongxing 11 Xu, Sanzhang 11 Zhu, Huihui 10 Benítez Lopez, Julio 10 Li, Tingting 10 Xiong, Zhiping 9 Puystjens, Roland 9 Stanimirović, Predrag S. 9 Styan, George P. H. 8 Cao, Chongguang 8 Ma, Haifeng 8 Martínez-Serrano, M. F. 8 Shu, Qianyu 8 Wang, Xueping 8 Wei, Junchao 8 Zhou, Mengmeng 7 Gao, Yuefeng 7 Hall, Frank J. 7 Hauke, Jan 7 Ke, Yuanyuan 7 Song, Chuanning 7 Xu, Qingxiang 7 Xu, Zhaoliang 7 Yu, Yaoming 6 Bart, Harm 6 Chen, Jianbiao 6 Dinčić, Nebojša Č. 6 Ehrhardt, Torsten 6 Huang, Junjie 6 Neumann, Michael 6 Silbermann, Bernd 6 Tan, Yijia 6 Wang, Guorong 6 Wang, Jin-Hsien 5 Danchev, Peter Vassilev 5 Djikić, Marko S. 5 Dolinar, Gregor 5 Dopazo, Esther 5 Efimov, Mikhail A. 5 Feng, Gang 5 Ferreyra, David E. 5 Qin, Yingying 5 Rakić, Dragan S. 5 Šemrl, Peter 5 Sheibani Abdolyousefi, Marjan 5 Sivakumar, Koratti Chengalrayan 5 Ungor, Burcu 5 Wu, Weijun 5 Yu, Anqi 5 Zhang, Daochang 5 Zhang, Xiaoxiang 5 Zuo, Kezheng 4 Castro González, Nieves 4 Chen, Alatancang 4 Chen, Guoliang 4 Chen, Xuzhou 4 Du, Hongke 4 Ge, Yanling 4 Guo, Li 4 Guralnick, Robert Michael 4 Jain, Surender Kumar 4 Jin, Hongwei 4 Karizaki, Mehdi Mohammadzadeh 4 Koliha, Jerry J. 4 Lam, Tsit-Yuen 4 Lee, Tsiu-Kwen 4 Lešnjak, Gorazd 4 Liu, Wanquan 4 Lv, Lingling 4 Markiewicz, Augustyn 4 Nielsen, Pace P. 4 Prasad, K. Manjunatha 4 Qin, Yonghui 4 Tam, Bit-Shun 4 Višnjić, Jelena M. ...and 621 more Authors all top 5 Cited in 155 Serials 264 Linear Algebra and its Applications 105 Linear and Multilinear Algebra 97 Applied Mathematics and Computation 27 Journal of Mathematical Analysis and Applications 27 Filomat 22 Journal of Algebra and its Applications 19 Communications in Algebra 12 Journal of Applied Mathematics and Computing 11 Journal of Computational and Applied Mathematics 10 Aequationes Mathematicae 10 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 10 Frontiers of Mathematics in China 10 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 9 Semigroup Forum 9 Journal of Mathematical Sciences (New York) 8 Computers & Mathematics with Applications 7 Proceedings of the American Mathematical Society 7 Journal of the Australian Mathematical Society 6 Czechoslovak Mathematical Journal 6 Computational and Applied Mathematics 6 Operators and Matrices 5 Journal of Algebra 5 Numerical Functional Analysis and Optimization 5 Quaestiones Mathematicae 5 International Journal of Computer Mathematics 5 Turkish Journal of Mathematics 5 Journal of Applied Mathematics 5 Mediterranean Journal of Mathematics 4 Indian Journal of Pure & Applied Mathematics 4 Mathematical Notes 4 Bulletin of the Iranian Mathematical Society 4 Mathematical and Computer Modelling 4 ELA. The Electronic Journal of Linear Algebra 4 Banach Journal of Mathematical Analysis 4 Journal of Mathematics 4 Open Mathematics 3 Bulletin of the Australian Mathematical Society 3 Communications in Mathematical Physics 3 Journal of the Franklin Institute 3 Nuclear Physics. B 3 Rocky Mountain Journal of Mathematics 3 Ukrainian Mathematical Journal 3 Integral Equations and Operator Theory 3 Transactions of the American Mathematical Society 3 Advances in Applied Clifford Algebras 3 Abstract and Applied Analysis 3 Journal of Inequalities and Applications 3 Complex Analysis and Operator Theory 3 Functional Analysis, Approximation and Computation 2 Archive for Rational Mechanics and Analysis 2 International Journal of Systems Science 2 Journal of Statistical Physics 2 Computing 2 Glasgow Mathematical Journal 2 Information Sciences 2 International Journal of Mathematics and Mathematical Sciences 2 Journal of Pure and Applied Algebra 2 Rendiconti del Circolo Matemàtico di Palermo. Serie II 2 Advances in Applied Mathematics 2 Communications in Statistics. Theory and Methods 2 Glasnik Matematički. Serija III 2 Algebra Colloquium 2 Mathematical Problems in Engineering 2 Soft Computing 2 Acta Mathematica Sinica. English Series 2 Lobachevskii Journal of Mathematics 2 Central European Journal of Mathematics 2 Hacettepe Journal of Mathematics and Statistics 2 International Electronic Journal of Algebra (IEJA) 2 Journal of Linear and Topological Algebra 2 International Journal of Applied and Computational Mathematics 2 AIMS Mathematics 1 The Canadian Journal of Statistics 1 Communications on Pure and Applied Mathematics 1 Discrete Applied Mathematics 1 Discrete Mathematics 1 International Journal of Mathematical Education in Science and Technology 1 Journal of Mathematical Physics 1 Mathematical Proceedings of the Cambridge Philosophical Society 1 Moscow University Mathematics Bulletin 1 Periodica Mathematica Hungarica 1 Mathematics of Computation 1 Algebra Universalis 1 Annals of the Institute of Statistical Mathematics 1 Annali di Matematica Pura ed Applicata. Serie Quarta 1 Annales Universitatis Mariae Curie-Skłodowska. Sectio A. Mathematica 1 BIT 1 Calcolo 1 Functional Analysis and its Applications 1 Publications Mathématiques 1 Journal of Functional Analysis 1 Journal of Soviet Mathematics 1 Journal of Statistical Planning and Inference 1 Kybernetika 1 Mathematica Slovaca 1 Monatshefte für Mathematik 1 Numerische Mathematik 1 Results in Mathematics 1 Revista Colombiana de Matemáticas 1 Revista de la Unión Matemática Argentina ...and 55 more Serials all top 5 Cited in 43 Fields 726 Linear and multilinear algebra; matrix theory (15-XX) 189 Associative rings and algebras (16-XX) 183 Operator theory (47-XX) 103 Numerical analysis (65-XX) 79 Order, lattices, ordered algebraic structures (06-XX) 75 Functional analysis (46-XX) 37 Group theory and generalizations (20-XX) 24 Combinatorics (05-XX) 15 Systems theory; control (93-XX) 13 Statistics (62-XX) 10 Computer science (68-XX) 9 Category theory; homological algebra (18-XX) 9 \(K\)-theory (19-XX) 9 Ordinary differential equations (34-XX) 8 Operations research, mathematical programming (90-XX) 7 Commutative algebra (13-XX) 6 Quantum theory (81-XX) 6 Statistical mechanics, structure of matter (82-XX) 6 Information and communication theory, circuits (94-XX) 5 Number theory (11-XX) 4 History and biography (01-XX) 3 Functions of a complex variable (30-XX) 3 Probability theory and stochastic processes (60-XX) 2 Field theory and polynomials (12-XX) 2 Nonassociative rings and algebras (17-XX) 2 Several complex variables and analytic spaces (32-XX) 2 Special functions (33-XX) 2 Difference and functional equations (39-XX) 2 Approximations and expansions (41-XX) 2 Integral transforms, operational calculus (44-XX) 2 Integral equations (45-XX) 2 Convex and discrete geometry (52-XX) 2 Biology and other natural sciences (92-XX) 1 General and overarching topics; collections (00-XX) 1 Mathematical logic and foundations (03-XX) 1 Algebraic geometry (14-XX) 1 Measure and integration (28-XX) 1 Sequences, series, summability (40-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Differential geometry (53-XX) 1 General topology (54-XX) 1 Mechanics of deformable solids (74-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Citations by Year