Edit Profile (opens in new tab) Freund, Roland W. Co-Author Distance Author ID: freund.roland-w Published as: Freund, Roland W.; Freund, Roland; Freund, R. W.; Freund, R. more...less Documents Indexed: 79 Publications since 1982, including 3 Books 6 Contributions as Editor Co-Authors: 52 Co-Authors with 53 Joint Publications 2,193 Co-Co-Authors all top 5 Co-Authors 32 single-authored 10 Jarre, Florian 7 Nachtigal, Noël M. 5 Bai, Zhaojun 5 Fischer, Bernd 5 Huckle, Thomas Kilian 3 Elman, Howard C. 3 Walker, Homer F. 2 Ashby, Steve 2 Dewilde, Patrick M. 2 Greenbaum, Anne 2 Hochbruck, Marlis 2 Malhotra, Manish 2 Marek, Ivo 2 Parter, Seymour V. 2 Saylor, Paul E. 2 Widlund, Olof B. 2 Zha, Hongyuan 1 Aliaga, José Ignacio 1 Baldwin, Chuck 1 Benzi, Michele 1 Boley, Daniel L. 1 Cai, Xiao-Chuan 1 Davis, Roger L. 1 Deuflhard, Peter 1 Duff, Iain S. 1 Ebeida, Mohamed S. 1 Estep, Donald J. 1 Feldmann, Peter 1 Gallopoulos, Efstratios 1 Golub, Gene Howard 1 Gutknecht, Martin H. 1 Hernández, Vicente G. 1 Hoppe, Ronald H. W. 1 Jordan, Kirk E. 1 Kelley, Tim 1 Keyes, David Elliot 1 Kilmer, Misha Elena 1 Leyffer, Sven 1 Manteuffel, Thomas A. 1 McCormick, Steve Fahrney 1 Mizuno, Shinji 1 Nakatsukasa, Yuji 1 Pinsky, Peter M. 1 Ruscheweyh, Stephan 1 Schaible, Siegfried 1 Silvester, David J. 1 Stoer, Josef 1 Tuminaro, Ray S. 1 Vogelbusch, Christoph H. 1 Walter, Artur Rudolf 1 Woodward, Carol S. 1 Yavneh, Irad all top 5 Serials 8 Linear Algebra and its Applications 6 SIAM Journal on Scientific Computing 5 Numerische Mathematik 4 Mathematical Programming. Series A. Series B 4 Numerical Linear Algebra with Applications 3 Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM) 3 Journal of Computational and Applied Mathematics 2 Journal of Approximation Theory 1 Computer Methods in Applied Mechanics and Engineering 1 Linear and Multilinear Algebra 1 Mathematics of Computation 1 ACM Transactions on Mathematical Software 1 Bayerische Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Klasse. Sitzungsberichte 1 BIT 1 IEEE Transactions on Automatic Control 1 International Journal for Numerical Methods in Engineering 1 Journal of Optimization Theory and Applications 1 Mathematics of Operations Research 1 SIAM Journal on Scientific and Statistical Computing 1 Complex Variables. Theory and Application 1 Operations Research Letters 1 Applied Numerical Mathematics 1 Approximation Theory and its Applications 1 Constructive Approximation 1 IMPACT of Computing in Science and Engineering 1 Journal of Global Optimization 1 IEEE Transactions on Circuits and Systems. II: Analog and Digital Signal Processing 1 SIAM Review 1 Optimization Methods & Software 1 Acta Numerica 1 Springer-Lehrbuch all top 5 Fields 57 Numerical analysis (65-XX) 13 Linear and multilinear algebra; matrix theory (15-XX) 13 Approximations and expansions (41-XX) 11 Systems theory; control (93-XX) 10 Operations research, mathematical programming (90-XX) 8 Information and communication theory, circuits (94-XX) 6 General and overarching topics; collections (00-XX) 6 Functions of a complex variable (30-XX) 4 Partial differential equations (35-XX) 4 Optics, electromagnetic theory (78-XX) 3 Fluid mechanics (76-XX) 2 Special functions (33-XX) 2 Ordinary differential equations (34-XX) 2 Harmonic analysis on Euclidean spaces (42-XX) 2 Computer science (68-XX) 1 Real functions (26-XX) 1 Integral equations (45-XX) 1 Operator theory (47-XX) 1 Probability theory and stochastic processes (60-XX) 1 Mechanics of deformable solids (74-XX) 1 Statistical mechanics, structure of matter (82-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 71 Publications have been cited 1,609 times in 1,152 Documents Cited by ▼ Year ▼ QMR: A quasi-minimal residual method for non-Hermitian linear systems. Zbl 0754.65034 Freund, Roland W.; Nachtigal, Noël M. 255 1991 A transpose-free quasi-minimal residual algorithm for non-Hermitian linear systems. Zbl 0781.65022 Freund, Roland W. 130 1993 An implementation of the look-ahead Lanczos algorithm for non-Hermitian matrices. Zbl 0770.65022 Freund, Roland W.; Gutknecht, Martin H.; Nachtigal, Noël M. 99 1993 Conjugate gradient-type methods for linear systems with complex symmetric coefficient matrices. Zbl 0761.65018 Freund, Roland W. 90 1992 Model reduction methods based on Krylov subspaces. Zbl 1046.65021 Freund, Roland W. 86 2003 Krylov-subspace methods for reduced-order modeling in circuit simulation. Zbl 0964.65082 Freund, Roland W. 76 2000 A block QMR algorithm for non-Hermitian linear systems with multiple right-hand sides. Zbl 0873.65021 Freund, Roland W.; Malhotra, Manish 67 1997 Solving the sum-of-ratios problem by an interior-point method. Zbl 1168.90644 Freund, Roland W.; Jarre, Florian 63 2001 Iterative solution of linear systems. Zbl 0762.65019 Freund, Roland W.; Golub, Gene H.; Nachtigal, Noël M. 61 1992 Nonlinear semidefinite programming: sensitivity, convergence, and an application in passive reduced-order modeling. Zbl 1147.90030 Freund, Roland W.; Jarre, Florian; Vogelbusch, Christoph H. 36 2007 On conjugate gradient type methods and polynomial preconditioners for a class of complex non-Hermitian matrices. Zbl 0702.65034 Freund, Roland 34 1990 Software for simplified Lanczos and QMR algorithms. Zbl 0853.65041 Freund, Roland W.; Nachtigal, Noël M. 32 1995 A Lanczos-type method for multiple starting vectors. Zbl 0953.65018 Aliaga, J. I.; Boley, D. L.; Freund, R. W.; Hernández, V. 31 2000 On the use of two QMR algorithms for solving singular systems and applications in Markov chain modeling. Zbl 0840.65021 Freund, Roland W.; Hochbruck, Marlis 29 1994 Solution of shifted linear systems by quasi-minimal residual iterations. Zbl 0794.65028 Freund, Roland W. 29 1993 An implementation of the QMR method based on coupled two-term recurrences. Zbl 0803.65036 Freund, Roland W.; Nachtigal, Noël M. 28 1994 Quasi-kernel polynomials and their use in non-Hermitian matrix iterations. Zbl 0760.65029 Freund, Roland W. 27 1992 An extension of the positive real lemma to descriptor systems. Zbl 1078.93056 Freund, Roland W.; Jarre, Florian 25 2004 Computing fundamental matrix decompositions accurately via the matrix sign function in two iterations: the power of Zolotarev’s functions. Zbl 1383.15012 Nakatsukasa, Yuji; Freund, Roland W. 21 2016 Iterative solution of multiple radiation and scattering problems in structural acoustics using a block quasi-minimal residual algorithm. Zbl 0901.76059 Malhotra, Manish; Freund, Roland W.; Pinsky, Peter M. 20 1997 A look-ahead algorithm for the solution of general Hankel systems. Zbl 0796.65028 Freund, Roland W.; Zha, Hongyuan 20 1993 Reduced-order modeling techniques based on Krylov subspaces and their use in circuit simulation. Zbl 0967.93008 Freund, Roland W. 19 1999 A partial Padé-via-Lanczos method for reduced-order modeling. Zbl 0980.93012 Bai, Zhaojun; Freund, Roland W. 19 2001 Formally biorthogonal polynomials and a look-ahead Levinson algorithm for general Toeplitz systems. Zbl 0777.65011 Freund, Roland W.; Zha, Hongyuan 18 1993 Fast secant methods for the iterative solution of large nonsymmetric linear systems. Zbl 0729.65027 Deuflhard, Peter; Freund, Roland; Walter, Artur 17 1990 An interior-point method for multifractional programs with convex constraints. Zbl 0824.90127 Freund, R. W.; Jarre, F. 16 1995 A note on two block-SOR methods for sparse least squares problems. Zbl 0621.65060 Freund, R. 16 1987 On a class of Chebyshev approximation problems which arise in connection with a conjugate gradient type method. Zbl 0611.65016 Freund, Roland; Ruscheweyh, Stephan 15 1986 Quasi-kernel polynomials and convergence results for quasi-minimal residual iterations. Zbl 0814.65035 Freund, Roland W. 14 1992 A QMR-based interior-point algorithm for solving linear programs. Zbl 0881.90094 Freund, Roland W.; Jarre, Florian 13 1997 Convergence of a class of inexact interior-point algorithms for linear programs. Zbl 0977.90021 Freund, Roland W.; Jarre, Florian; Mizuno, Shinji 11 1999 Padé-type model reduction of second-order and higher-order linear dynamical systems. Zbl 1079.65532 Freund, Roland W. 11 2005 Eigenvalue-based characterization and test for positive realness of scalar transfer functions. Zbl 0990.93044 Bai, Zhaojun; Freund, Roland W. 10 2000 Chebyshev polynomials are not always optimal. Zbl 0738.41027 Fischer, Bernd; Freund, Roland 10 1991 A look-ahead Bareiss algorithm for general Toeplitz matrices. Zbl 0811.65023 Freund, Roland W. 10 1994 Structure-preserving model order reduction of RCL circuit equations. Zbl 1164.94014 Freund, Roland W. 10 2008 On polynomial preconditioning and asymptotic convergence factors for indefinite Hermitian matrices. Zbl 0731.65022 Freund, Roland 9 1991 A symmetric band Lanczos process based on coupled recurrences and some applications. Zbl 0997.65064 Bai, Zhaojun; Freund, Roland W. 8 2001 Reduced-order modeling. Zbl 1180.78032 Bai, Zhaojun; Dewilde, Patrick M.; Freund, Roland W. 8 2005 QMRPACK: A package of QMR algorithms. Zbl 0884.65027 Freund, Roland W.; Nachtigal, Noël M. 8 1996 On the solution of large indefinite systems of linear equations by conjugate gradient algorithms. Zbl 0499.65018 Stoer, J.; Freund, R. 7 1982 Über einige CG-ähnliche Verfahren zur Lösung linearer Gleichungssysteme. Zbl 0531.65017 Freund, Roland 7 1983 Computation of matrix Padé approximations of transfer functions via a Lanczos-type process. Zbl 1137.41321 Freund, Roland W. 7 1995 On polynomial approximations to \(f_ a(z)(z-a)^{-1}\) with complex a and some applications to certain non-Hermitian matrices. Zbl 0693.41009 Freund, R. 7 1989 Krylov subspaces associated with higher-order linear dynamical systems. Zbl 1084.65032 Freund, Roland W. 6 2005 On the constrained Chebyshev approximation problem on ellipses. Zbl 0728.41023 Fischer, Bernd; Freund, Roland 6 1990 Small-signal circuit analysis and sensitivity computations with the PVL algorithm. Zbl 0878.93010 Freund, Roland W.; Feldmann, Peter 6 1996 An interior-point method for fractional programs with convex constraints. Zbl 0832.90114 Freund, Roland W.; Jarre, Florian 5 1994 A sensitivity result for semidefinite programs. Zbl 1036.90066 Freund, Roland W.; Jarre, Florian 5 2004 Circuit simulation techniques based on Lanczos-type algorithms. Zbl 0933.94042 Freund, R. W. 5 1997 On adaptive weighted polynomial preconditioning for Hermitian positive definite matrices. Zbl 0803.65037 Fischer, Bernd; Freund, Roland W. 5 1994 Transpose-free quasi-minimal residual methods for non-Hermitian linear systems. Zbl 0804.65032 Freund, Roland W. 5 1994 On some approximation problems for complex polynomials. Zbl 0645.41021 Freund, Roland 4 1988 Using Krylov-subspace iterations in discontinuous Galerkin methods for nonlinear reaction-diffusion systems. Zbl 0946.65079 Estep, Donald J.; Freund, Roland W. 4 2000 On self-concordant barrier functions for conic hulls and fractional programming. Zbl 0855.90122 Freund, Roland W.; Jarre, Florian; Schaible, Siegfried 4 1996 A new fast hybrid adaptive grid generation technique for arbitrary two-dimensional domains. Zbl 1202.76091 Ebeida, Mohamed S.; Davis, Roger L.; Freund, Roland W. 3 2010 The look-ahead Lanczos process for nonsymmetric matrices and its applications. Zbl 1260.65025 Freund, Roland W. 3 1994 On h-contractions and the extension problem for Hermitian block Toeplitz matrices. Zbl 0676.15012 Freund, Roland; Huckle, Thomas 2 1989 Computation of matrix-valued formally orthogonal polynomials and applications. Zbl 0980.65020 Freund, Roland W. 2 2001 On Hermitian block Toeplitz matrices and generalizations of a theorem of C. Carathéodory. Zbl 0699.15010 Freund, Roland; Huckle, Thomas 2 1989 Explicitly solvable complex Chebyshev approximation problems related to sine polynomials. Zbl 0705.41029 Freund, Roland 2 1989 On Padé-type model order reduction of \(J\)-Hermitian linear dynamical systems. Zbl 1147.93014 Freund, Roland W. 2 2008 An extension problem for H-unitary matrices with applications to Hermitian Toeplitz matrices. Zbl 0679.15025 Freund, Roland; Huckle, Thomas 1 1988 Extension problems for H-unitary matrices and Hermitian block Toeplitz matrices. Zbl 0685.15020 Freund, R.; Huckle, T. 1 1989 Czech-US workshop on iterative methods and parallel computing. Part 1. Papers from the workshop, Milovy, Czech Republic, June 16–21, 1997. Zbl 0976.00029 1 1999 Stoer/Bulirsch: Numerical mathematics 1. 10th revised ed. (Stoer/Bulirsch: Numerische Mathematik 1.) Zbl 1129.65001 Freund, Roland W.; Hoppe, Ronald H. W. 1 2007 Optimal Chebyshev polynomials on ellipses in the complex plane. Zbl 0705.41010 Fischer, B.; Freund, R. 1 1989 Krylov subspace methods for complex non-Hermitian linear systems. Zbl 0744.65027 Freund, Roland 1 1991 A restricted signature normal form for Hermitian matrices, quasi-spectral decompositions, and applications. Zbl 0776.15005 Freund, Roland W.; Huckle, Thomas 1 1993 Implementation details of the coupled QMR algorithm. Zbl 0794.65029 Freund, Roland W.; Nachtigal, Noël M. 1 1993 A biconjugate gradient-type algorithm for the iterative solution of non- Hermitian linear systems on massively parallel architectures. Zbl 0789.65020 Freund, R. W.; Hochbruck, M. 1 1992 Computing fundamental matrix decompositions accurately via the matrix sign function in two iterations: the power of Zolotarev’s functions. Zbl 1383.15012 Nakatsukasa, Yuji; Freund, Roland W. 21 2016 A new fast hybrid adaptive grid generation technique for arbitrary two-dimensional domains. Zbl 1202.76091 Ebeida, Mohamed S.; Davis, Roger L.; Freund, Roland W. 3 2010 Structure-preserving model order reduction of RCL circuit equations. Zbl 1164.94014 Freund, Roland W. 10 2008 On Padé-type model order reduction of \(J\)-Hermitian linear dynamical systems. Zbl 1147.93014 Freund, Roland W. 2 2008 Nonlinear semidefinite programming: sensitivity, convergence, and an application in passive reduced-order modeling. Zbl 1147.90030 Freund, Roland W.; Jarre, Florian; Vogelbusch, Christoph H. 36 2007 Stoer/Bulirsch: Numerical mathematics 1. 10th revised ed. (Stoer/Bulirsch: Numerische Mathematik 1.) Zbl 1129.65001 Freund, Roland W.; Hoppe, Ronald H. W. 1 2007 Padé-type model reduction of second-order and higher-order linear dynamical systems. Zbl 1079.65532 Freund, Roland W. 11 2005 Reduced-order modeling. Zbl 1180.78032 Bai, Zhaojun; Dewilde, Patrick M.; Freund, Roland W. 8 2005 Krylov subspaces associated with higher-order linear dynamical systems. Zbl 1084.65032 Freund, Roland W. 6 2005 An extension of the positive real lemma to descriptor systems. Zbl 1078.93056 Freund, Roland W.; Jarre, Florian 25 2004 A sensitivity result for semidefinite programs. Zbl 1036.90066 Freund, Roland W.; Jarre, Florian 5 2004 Model reduction methods based on Krylov subspaces. Zbl 1046.65021 Freund, Roland W. 86 2003 Solving the sum-of-ratios problem by an interior-point method. Zbl 1168.90644 Freund, Roland W.; Jarre, Florian 63 2001 A partial Padé-via-Lanczos method for reduced-order modeling. Zbl 0980.93012 Bai, Zhaojun; Freund, Roland W. 19 2001 A symmetric band Lanczos process based on coupled recurrences and some applications. Zbl 0997.65064 Bai, Zhaojun; Freund, Roland W. 8 2001 Computation of matrix-valued formally orthogonal polynomials and applications. Zbl 0980.65020 Freund, Roland W. 2 2001 Krylov-subspace methods for reduced-order modeling in circuit simulation. Zbl 0964.65082 Freund, Roland W. 76 2000 A Lanczos-type method for multiple starting vectors. Zbl 0953.65018 Aliaga, J. I.; Boley, D. L.; Freund, R. W.; Hernández, V. 31 2000 Eigenvalue-based characterization and test for positive realness of scalar transfer functions. Zbl 0990.93044 Bai, Zhaojun; Freund, Roland W. 10 2000 Using Krylov-subspace iterations in discontinuous Galerkin methods for nonlinear reaction-diffusion systems. Zbl 0946.65079 Estep, Donald J.; Freund, Roland W. 4 2000 Reduced-order modeling techniques based on Krylov subspaces and their use in circuit simulation. Zbl 0967.93008 Freund, Roland W. 19 1999 Convergence of a class of inexact interior-point algorithms for linear programs. Zbl 0977.90021 Freund, Roland W.; Jarre, Florian; Mizuno, Shinji 11 1999 Czech-US workshop on iterative methods and parallel computing. Part 1. Papers from the workshop, Milovy, Czech Republic, June 16–21, 1997. Zbl 0976.00029 1 1999 A block QMR algorithm for non-Hermitian linear systems with multiple right-hand sides. Zbl 0873.65021 Freund, Roland W.; Malhotra, Manish 67 1997 Iterative solution of multiple radiation and scattering problems in structural acoustics using a block quasi-minimal residual algorithm. Zbl 0901.76059 Malhotra, Manish; Freund, Roland W.; Pinsky, Peter M. 20 1997 A QMR-based interior-point algorithm for solving linear programs. Zbl 0881.90094 Freund, Roland W.; Jarre, Florian 13 1997 Circuit simulation techniques based on Lanczos-type algorithms. Zbl 0933.94042 Freund, R. W. 5 1997 QMRPACK: A package of QMR algorithms. Zbl 0884.65027 Freund, Roland W.; Nachtigal, Noël M. 8 1996 Small-signal circuit analysis and sensitivity computations with the PVL algorithm. Zbl 0878.93010 Freund, Roland W.; Feldmann, Peter 6 1996 On self-concordant barrier functions for conic hulls and fractional programming. Zbl 0855.90122 Freund, Roland W.; Jarre, Florian; Schaible, Siegfried 4 1996 Software for simplified Lanczos and QMR algorithms. Zbl 0853.65041 Freund, Roland W.; Nachtigal, Noël M. 32 1995 An interior-point method for multifractional programs with convex constraints. Zbl 0824.90127 Freund, R. W.; Jarre, F. 16 1995 Computation of matrix Padé approximations of transfer functions via a Lanczos-type process. Zbl 1137.41321 Freund, Roland W. 7 1995 On the use of two QMR algorithms for solving singular systems and applications in Markov chain modeling. Zbl 0840.65021 Freund, Roland W.; Hochbruck, Marlis 29 1994 An implementation of the QMR method based on coupled two-term recurrences. Zbl 0803.65036 Freund, Roland W.; Nachtigal, Noël M. 28 1994 A look-ahead Bareiss algorithm for general Toeplitz matrices. Zbl 0811.65023 Freund, Roland W. 10 1994 An interior-point method for fractional programs with convex constraints. Zbl 0832.90114 Freund, Roland W.; Jarre, Florian 5 1994 On adaptive weighted polynomial preconditioning for Hermitian positive definite matrices. Zbl 0803.65037 Fischer, Bernd; Freund, Roland W. 5 1994 Transpose-free quasi-minimal residual methods for non-Hermitian linear systems. Zbl 0804.65032 Freund, Roland W. 5 1994 The look-ahead Lanczos process for nonsymmetric matrices and its applications. Zbl 1260.65025 Freund, Roland W. 3 1994 A transpose-free quasi-minimal residual algorithm for non-Hermitian linear systems. Zbl 0781.65022 Freund, Roland W. 130 1993 An implementation of the look-ahead Lanczos algorithm for non-Hermitian matrices. Zbl 0770.65022 Freund, Roland W.; Gutknecht, Martin H.; Nachtigal, Noël M. 99 1993 Solution of shifted linear systems by quasi-minimal residual iterations. Zbl 0794.65028 Freund, Roland W. 29 1993 A look-ahead algorithm for the solution of general Hankel systems. Zbl 0796.65028 Freund, Roland W.; Zha, Hongyuan 20 1993 Formally biorthogonal polynomials and a look-ahead Levinson algorithm for general Toeplitz systems. Zbl 0777.65011 Freund, Roland W.; Zha, Hongyuan 18 1993 A restricted signature normal form for Hermitian matrices, quasi-spectral decompositions, and applications. Zbl 0776.15005 Freund, Roland W.; Huckle, Thomas 1 1993 Implementation details of the coupled QMR algorithm. Zbl 0794.65029 Freund, Roland W.; Nachtigal, Noël M. 1 1993 Conjugate gradient-type methods for linear systems with complex symmetric coefficient matrices. Zbl 0761.65018 Freund, Roland W. 90 1992 Iterative solution of linear systems. Zbl 0762.65019 Freund, Roland W.; Golub, Gene H.; Nachtigal, Noël M. 61 1992 Quasi-kernel polynomials and their use in non-Hermitian matrix iterations. Zbl 0760.65029 Freund, Roland W. 27 1992 Quasi-kernel polynomials and convergence results for quasi-minimal residual iterations. Zbl 0814.65035 Freund, Roland W. 14 1992 A biconjugate gradient-type algorithm for the iterative solution of non- Hermitian linear systems on massively parallel architectures. Zbl 0789.65020 Freund, R. W.; Hochbruck, M. 1 1992 QMR: A quasi-minimal residual method for non-Hermitian linear systems. Zbl 0754.65034 Freund, Roland W.; Nachtigal, Noël M. 255 1991 Chebyshev polynomials are not always optimal. Zbl 0738.41027 Fischer, Bernd; Freund, Roland 10 1991 On polynomial preconditioning and asymptotic convergence factors for indefinite Hermitian matrices. Zbl 0731.65022 Freund, Roland 9 1991 Krylov subspace methods for complex non-Hermitian linear systems. Zbl 0744.65027 Freund, Roland 1 1991 On conjugate gradient type methods and polynomial preconditioners for a class of complex non-Hermitian matrices. Zbl 0702.65034 Freund, Roland 34 1990 Fast secant methods for the iterative solution of large nonsymmetric linear systems. Zbl 0729.65027 Deuflhard, Peter; Freund, Roland; Walter, Artur 17 1990 On the constrained Chebyshev approximation problem on ellipses. Zbl 0728.41023 Fischer, Bernd; Freund, Roland 6 1990 On polynomial approximations to \(f_ a(z)(z-a)^{-1}\) with complex a and some applications to certain non-Hermitian matrices. Zbl 0693.41009 Freund, R. 7 1989 On h-contractions and the extension problem for Hermitian block Toeplitz matrices. Zbl 0676.15012 Freund, Roland; Huckle, Thomas 2 1989 On Hermitian block Toeplitz matrices and generalizations of a theorem of C. Carathéodory. Zbl 0699.15010 Freund, Roland; Huckle, Thomas 2 1989 Explicitly solvable complex Chebyshev approximation problems related to sine polynomials. Zbl 0705.41029 Freund, Roland 2 1989 Extension problems for H-unitary matrices and Hermitian block Toeplitz matrices. Zbl 0685.15020 Freund, R.; Huckle, T. 1 1989 Optimal Chebyshev polynomials on ellipses in the complex plane. Zbl 0705.41010 Fischer, B.; Freund, R. 1 1989 On some approximation problems for complex polynomials. Zbl 0645.41021 Freund, Roland 4 1988 An extension problem for H-unitary matrices with applications to Hermitian Toeplitz matrices. Zbl 0679.15025 Freund, Roland; Huckle, Thomas 1 1988 A note on two block-SOR methods for sparse least squares problems. Zbl 0621.65060 Freund, R. 16 1987 On a class of Chebyshev approximation problems which arise in connection with a conjugate gradient type method. Zbl 0611.65016 Freund, Roland; Ruscheweyh, Stephan 15 1986 Über einige CG-ähnliche Verfahren zur Lösung linearer Gleichungssysteme. Zbl 0531.65017 Freund, Roland 7 1983 On the solution of large indefinite systems of linear equations by conjugate gradient algorithms. Zbl 0499.65018 Stoer, J.; Freund, R. 7 1982 all cited Publications top 5 cited Publications all top 5 Cited by 1,590 Authors 27 Freund, Roland W. 22 Huang, Ting-Zhu 21 Benner, Peter 21 Simoncini, Valeria 18 Jiang, Yaolin 18 Wei, Yimin 12 Mehrmann, Volker 11 Gu, Xian-Ming 11 Szyld, Daniel B. 11 Wathen, Andrew John 10 Carpentieri, Bruno 10 Sleijpen, Gerard L. G. 10 Toutounian, Faezeh 9 Gu, Tongxiang 9 Jarre, Florian 9 Jing, Yanfei 9 Martínez, José Mario 9 Pini, Giorgio 9 Pinsky, Peter M. 9 Pulch, Roland 9 Shen, Weiping 9 Sogabe, Tomohiro 8 Brezinski, Claude 8 Gutknecht, Martin H. 8 Li, Chong 8 Saad, Yousef 8 Sadok, Hassane 8 Shen, Peiping 8 Van Dooren, Paul M. 8 Wu, Gang 8 Zhang, Jianhua 8 Zhang, Jun 8 Zuo, Xianyu 7 Cao, Zhihao 7 Dai, Hua 7 Farhat, Charbel H. 7 Heyouni, Mohammed 7 Hladík, Milan 7 Jia, Zhongxiao 7 Li, Liang 7 Malhotra, Manish 7 Morgan, Ronald B. 7 Pestana, Jennifer 7 Van der Vorst, Henk Albertus 7 Zhang, Shao-Liang 6 Bao, Liang 6 Chen, Zhongwen 6 Du, Lei 6 Evans, David John 6 Ferronato, Massimiliano 6 Gambolati, Giuseppe 6 Gemignani, Luca 6 Hochbruck, Marlis 6 Li, Houbiao 6 Lin, Yiqin 6 Ma, Changfeng 6 Nakatsukasa, Yuji 6 Oberai, Assad A. 6 Redivo-Zaglia, Michela 6 Reichel, Lothar 6 Reis, Timo 6 Van Barel, Marc 6 Wu, Shiliang 6 Zhang, Litao 5 Bai, Zhaojun 5 Bellavia, Stefania 5 Dehghan Takht Fooladi, Mehdi 5 Feng, Lihong 5 Fischer, Bernd 5 Frommer, Andreas 5 Gawlik, Evan S. 5 Gondzio, Jacek 5 Huckle, Thomas Kilian 5 Jbilou, Khalide 5 Li, Cuixia 5 Liu, Chein-Shan 5 Lohmann, Boris 5 Meng, Jing 5 Pozza, Stefano 5 Strakoš, Zdeněk 5 Stykel, Tatjana 5 Van Gijzen, Martin Bastiaan 5 Wen, Chun 5 Xia, Yong 5 Yamashita, Hiroshi 5 Yao, Jen-Chih 5 Ye, Qiang 4 Axelsson, Axel Owe Holger 4 Benson, Harold P. 4 Benzi, Michele 4 Bergamaschi, Luca 4 Boley, Daniel L. 4 Bultheel, Adhemar François 4 De Simone, Valentina 4 di Serafino, Daniela 4 Druskin, Vladimir 4 Elman, Howard C. 4 Gallivan, Kyle A. 4 Ghafoor, Abdul 4 Golub, Gene Howard ...and 1,490 more Authors all top 5 Cited in 196 Serials 107 Journal of Computational and Applied Mathematics 82 Linear Algebra and its Applications 52 Applied Numerical Mathematics 49 Applied Mathematics and Computation 48 Numerical Algorithms 47 Journal of Computational Physics 39 Computer Methods in Applied Mechanics and Engineering 37 Computers & Mathematics with Applications 36 Numerical Linear Algebra with Applications 29 SIAM Journal on Matrix Analysis and Applications 28 BIT 26 SIAM Journal on Scientific Computing 19 International Journal of Computer Mathematics 18 International Journal for Numerical Methods in Engineering 18 Numerische Mathematik 16 Computational Optimization and Applications 14 Journal of the Franklin Institute 13 Mathematical Programming. Series A. Series B 12 Journal of Optimization Theory and Applications 12 Engineering Analysis with Boundary Elements 12 Mathematical and Computer Modelling of Dynamical Systems 11 Systems & Control Letters 10 Journal of Scientific Computing 10 Japan Journal of Industrial and Applied Mathematics 10 Optimization Methods & Software 9 Computer Physics Communications 9 Journal of Global Optimization 8 Computational and Applied Mathematics 8 Journal of Computational Acoustics 7 International Journal of Control 7 Mathematics of Computation 7 ETNA. Electronic Transactions on Numerical Analysis 6 Automatica 6 Calcolo 6 SIAM Review 6 Mathematical Problems in Engineering 6 Journal of Applied Mathematics 5 International Journal for Numerical Methods in Fluids 5 Computing 5 Journal of Approximation Theory 5 Mathematics and Computers in Simulation 5 SIAM Journal on Numerical Analysis 5 Circuits, Systems, and Signal Processing 5 Constructive Approximation 5 COMPEL 5 Applied Mathematical Modelling 5 European Journal of Operational Research 5 Advances in Computational Mathematics 5 Journal of Applied Mathematics and Computing 5 GAMM-Mitteilungen 4 International Journal for Numerical and Analytical Methods in Geomechanics 4 Linear and Multilinear Algebra 4 Optimization 4 Numerical Methods for Partial Differential Equations 4 Applied Mathematics Letters 4 ZAMM. Zeitschrift für Angewandte Mathematik und Mechanik 4 Acta Numerica 3 Operations Research Letters 3 Computers & Operations Research 3 Computational Mechanics 3 Applications of Mathematics 3 Communications in Numerical Methods in Engineering 3 European Journal of Control 3 Computing and Visualization in Science 3 Multibody System Dynamics 3 Multiscale Modeling & Simulation 3 European Series in Applied and Industrial Mathematics (ESAIM): Mathematical Modelling and Numerical Analysis 3 Numerical Algebra, Control and Optimization 3 East Asian Journal on Applied Mathematics 2 Inverse Problems 2 Journal of Fluid Mechanics 2 Journal of Mathematical Analysis and Applications 2 Proceedings of the American Mathematical Society 2 SIAM Journal on Control and Optimization 2 Acta Applicandae Mathematicae 2 Mitteilungen der Gesellschaft für Angewandte Mathematik und Mechanik 2 Parallel Computing 2 Acta Mathematicae Applicatae Sinica. English Series 2 Asia-Pacific Journal of Operational Research 2 Journal of Economic Dynamics & Control 2 Mathematical and Computer Modelling 2 Annals of Operations Research 2 Journal of Mathematical Sciences (New York) 2 Parallel Algorithms and Applications 2 Vietnam Journal of Mathematics 2 Abstract and Applied Analysis 2 Mathematical Methods of Operations Research 2 Journal of Inequalities and Applications 2 Journal of Combinatorial Optimization 2 Communications in Nonlinear Science and Numerical Simulation 2 International Journal of Applied Mathematics and Computer Science 2 Computational Geosciences 2 The ANZIAM Journal 2 Archives of Computational Methods in Engineering 2 Journal of Industrial and Management Optimization 2 Optimization Letters 2 Mathematical Programming Computation 2 Science China. Mathematics 2 Journal of Applied Mathematics & Informatics 2 Journal of Mathematics in Industry ...and 96 more Serials all top 5 Cited in 48 Fields 822 Numerical analysis (65-XX) 157 Operations research, mathematical programming (90-XX) 129 Linear and multilinear algebra; matrix theory (15-XX) 129 Systems theory; control (93-XX) 100 Partial differential equations (35-XX) 92 Fluid mechanics (76-XX) 53 Optics, electromagnetic theory (78-XX) 46 Mechanics of deformable solids (74-XX) 38 Approximations and expansions (41-XX) 28 Ordinary differential equations (34-XX) 23 Computer science (68-XX) 20 Operator theory (47-XX) 17 Calculus of variations and optimal control; optimization (49-XX) 17 Information and communication theory, circuits (94-XX) 16 Functions of a complex variable (30-XX) 15 Dynamical systems and ergodic theory (37-XX) 13 Quantum theory (81-XX) 12 Statistical mechanics, structure of matter (82-XX) 11 Biology and other natural sciences (92-XX) 10 Probability theory and stochastic processes (60-XX) 8 Special functions (33-XX) 8 Harmonic analysis on Euclidean spaces (42-XX) 8 Mechanics of particles and systems (70-XX) 7 Geophysics (86-XX) 7 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 6 Statistics (62-XX) 5 Real functions (26-XX) 5 Integral transforms, operational calculus (44-XX) 4 History and biography (01-XX) 4 Combinatorics (05-XX) 4 Integral equations (45-XX) 4 Classical thermodynamics, heat transfer (80-XX) 3 Differential geometry (53-XX) 2 General and overarching topics; collections (00-XX) 2 Field theory and polynomials (12-XX) 2 Algebraic geometry (14-XX) 2 Functional analysis (46-XX) 2 Global analysis, analysis on manifolds (58-XX) 1 Mathematical logic and foundations (03-XX) 1 Nonassociative rings and algebras (17-XX) 1 Group theory and generalizations (20-XX) 1 Measure and integration (28-XX) 1 Potential theory (31-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Difference and functional equations (39-XX) 1 Geometry (51-XX) 1 Manifolds and cell complexes (57-XX) 1 Relativity and gravitational theory (83-XX) Citations by Year