Edit Profile (opens in new tab) Njåstad, Olav Compute Distance To: Compute Author ID: njastad.olav Published as: Njåstad, Olav; Njåstad, O.; Njastad, Olav more...less Homepage: https://www.ntnu.edu/employees/njastad External Links: dblp Documents Indexed: 147 Publications since 1963, including 2 Books 2 Contributions as Editor Co-Authors: 22 Co-Authors with 102 Joint Publications 539 Co-Co-Authors all top 5 Co-Authors 46 single-authored 58 González-Vera, Pablo 53 Hendriksen, Erik 51 Bultheel, Adhemar François 19 Jones, William Branham 14 Thron, Wolfgang Joseph 10 Waadeland, Haakon 6 Daruis, Leyla 4 Bonan-Hamada, Catherine M. 4 Chattopadhyay, K. C. 4 Cruz-Barroso, Ruymán 2 Alfsen, Erik M. 2 Díaz-Mendoza, Carlos 2 Jiménez Paiz, Mateo M. 2 Santos-León, Juan-Carlos 2 Van Assche, Walter 1 Gonzáles-Vera, Pablo 1 López Lagomasino, Guillermo Tomás 1 Lorentzen, Lisa 1 Marcellán Español, Francisco 1 Orive Rodríguez, Ramón Angel 1 Rønning, Frode 1 Saff, Edward Barry all top 5 Serials 30 Journal of Computational and Applied Mathematics 9 Journal of Mathematical Analysis and Applications 8 Numerical Algorithms 6 Rocky Mountain Journal of Mathematics 5 Journal of Approximation Theory 3 Mathematica Scandinavica 3 Proceedings of the Edinburgh Mathematical Society. Series II 3 Journal of the Australian Mathematical Society. Series A 3 Methods and Applications of Analysis 3 Analysis (München) 2 Fundamenta Mathematicae 2 Pacific Journal of Mathematics 2 Proceedings of the American Mathematical Society 2 Proceedings of the London Mathematical Society. Third Series 2 Transactions of the American Mathematical Society 2 Applied Numerical Mathematics 2 Constructive Approximation 2 Revista de la Academia Canaria de Ciencias 2 East Journal on Approximations 2 Skrifter. Det Kongelige Norske Videnskabers Selskab 2 Det Kongelige Norske Videnskabers Selskabs Forhandlinger 2 Cambridge Monographs on Applied and Computational Mathematics 1 IMA Journal of Numerical Analysis 1 Mathematics of Computation 1 Applied Mathematics and Computation 1 Bulletin of the London Mathematical Society 1 Canadian Journal of Mathematics 1 The Journal of the Indian Mathematical Society. New Series 1 Mathematische Annalen 1 Mathematica Japonica 1 Mathematische Zeitschrift 1 Monatshefte für Mathematik 1 Topology and its Applications 1 Analysis 1 Acta Applicandae Mathematicae 1 Journal of Complexity 1 SIAM Journal on Mathematical Analysis 1 ETNA. Electronic Transactions on Numerical Analysis 1 Advances in Computational Mathematics 1 Journal of the London Mathematical Society 1 Nordisk Matematisk Tidskrift 1 Annales Mathematicae et Informaticae all top 5 Fields 68 Functions of a complex variable (30-XX) 61 Harmonic analysis on Euclidean spaces (42-XX) 55 Approximations and expansions (41-XX) 32 Special functions (33-XX) 24 Integral transforms, operational calculus (44-XX) 18 Numerical analysis (65-XX) 13 General topology (54-XX) 9 Information and communication theory, circuits (94-XX) 7 Sequences, series, summability (40-XX) 2 General and overarching topics; collections (00-XX) 1 History and biography (01-XX) 1 Mathematical logic and foundations (03-XX) 1 Category theory; homological algebra (18-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 Operator theory (47-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 124 Publications have been cited 1,542 times in 691 Documents Cited by ▼ Year ▼ On some classes of nearly open sets. Zbl 0137.41903Njåstad, Olav 226 1965 Moment theory, orthogonal polynomials, quadrature, and continued fractions associated with the unit circle. Zbl 0637.30035Jones, William B.; Njåstad, Olav; Thron, W. J. 171 1989 Orthogonal rational functions and tridiagonal matrices. Zbl 1014.42017Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 69 2003 Two-point Padé expansions for a family of analytic functions. Zbl 0533.41014Jones, William B.; Njåstad, Olav; Thron, W. J. 51 1983 Orthogonal Laurent polynomials and the strong Hamburger moment problem. Zbl 0535.44006Jones, William B.; Thron, W. J.; Njåstad, Olav 51 1984 Orthogonal rational functions. Zbl 0923.42017Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 46 1999 The theory of sequences of orthogonal L-polynomials. Zbl 0643.33011Njåstad, Olav; Thron, W. J. 38 1983 Some results about numerical quadrature on the unit circle. Zbl 0856.41025González-Vera, Pablo; Santos-León, J. C.; Njåstad, Olav 35 1996 Orthogonal Laurent polynomials and strong moment theory: A survey. Zbl 0943.30024Jones, William B.; Njåstad, Olav 27 1999 Szegő polynomials applied to frequency analysis. Zbl 0784.65105Jones, William B.; Thron, W. J.; Njåstad, Olav; Waadeland, Haakon 27 1993 Szegö polynomials associated with Wiener-Levinson filters. Zbl 0718.94002Jones, William B.; Njåstad, Olav; Saff, E. B. 26 1990 The computation of orthogonal rational functions and their interpolating properties. Zbl 0758.65009Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 26 1992 Continued fractions associated with trigonometric and other strong moment problems. Zbl 0634.41015Jones, William B.; Njåstad, Olav; Thron, W. J. 23 1986 On Wallman-type compactifications. Zbl 0131.20404Njåstad, Olav 19 1966 Convergence of two-point Padé approximants to series of Stieltjes. Zbl 0721.30026González-Vera, Pablo; Njåstad, Olav 19 1990 Applications of Szegö polynomials to digital signal processing. Zbl 0729.94002Jones, William B.; Njåstad, Olav 19 1991 Orthogonal rational functions and quadrature on the unit circle. Zbl 0786.42011Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 18 1992 Moment problems and orthogonal functions. Zbl 0795.33003Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 18 1993 Recurrence relations for orthogonal functions. Zbl 0813.30007Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 17 1994 Sequences of orthogonal Laurent polynomials, bi-orthogonality and quadrature formulas on the unit circle. Zbl 1136.42020Cruz-Barroso, Ruymán; Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 16 2007 Orthogonal rational functions with poles on the unit circle. Zbl 0796.33003Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 16 1994 An alternative way of using Szegö polynomials in frequency analysis. Zbl 0818.33004Jones, William B.; Njåstad, Olav; Waadeland, Haakon 16 1994 Orthogonal rational functions and interpolatory product rules on the unit circle. III: Convergence of general sequences. Zbl 0979.41019Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 15 2000 Unique solvability of the strong Hamburger moment problem. Zbl 0593.44006Njåstad, Olav; Thron, W. J. 14 1986 Schur fractions, Perron-Carathéodory fractions and Szegö polynomials, a survey. Zbl 0596.30009Jones, W. B.; Njåstad, Olav; Thron, W. J. 14 1986 Orthogonality and quadrature on the unit circle. Zbl 0830.30022Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 14 1991 Continued fractions and strong Hamburger moment problems. Zbl 0497.40001Jones, William B.; Njåstad, Olav; Thron, W. J. 14 1983 Szegö quadrature formulas for certain Jacobi-type weight functions. Zbl 0989.41015Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 13 2002 Orthogonal rational functions and interpolatory product rules on the unit circle. II: Quadrature and convergence. Zbl 0929.30027Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 13 1998 Quadrature and orthogonal rational functions. Zbl 0970.41020Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 13 2001 Orthogonal rational functions similar to Szegö polynomials. Zbl 0829.42020Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 12 1991 Solutions of the strong Hamburger moment problem. Zbl 0853.44004Njåstad, Olav 12 1996 Quadrature rules for periodic integrands. Bi-orthogonality and para-orthogonality. Zbl 1108.41017Cruz-Barrosó, Ruymán; Daruisa, Leyla; González-Vera, Pablo; Njastad, Olav 12 2005 A Favard theorem for orthogonal rational functions on the unit circle. Zbl 0786.42010Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 12 1992 Solutions of the strong Stieltjes moment problem. Zbl 0841.30033Njåstad, Olav 11 1995 A rational moment problem on the unit circle. Zbl 0905.30030Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 11 1997 Quadrature formulas on the unit circle based on rational functions. Zbl 0809.41027Bultheel, Adhemar; Hendriksen, Erik; González-Vera, Pablo; Njåstad, Olav 11 1994 On bi-orthogonal systems of trigonometric functions and quadrature formulas for periodic integrands. Zbl 1129.65014Cruz-Barroso, Ruymán; González-Vera, Pablo; Njåstad, Olav 10 2007 Orthogonal rational functions and quadrature on the real half line. Zbl 1049.42012Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 10 2003 Para-orthogonal polynomials in frequency analysis. Zbl 1042.94001Daruis, Leyla; Njåstad, Olav; Van Assche, Walter 10 2003 Generalized Szegö theory in frequency analysis. Zbl 0872.42006Njåstad, Olav; Waadeland, Haakon 10 1997 Asymptotic properties of zeros of orthogonal rational functions. Zbl 0864.42010Njåstad, Olav; Waadeland, Haakon 9 1997 Merotopic spaces and extensions of closure spaces. Zbl 0493.54017Chattopadhyay, K. C.; Njåstad, Olav; Thron, W. J. 9 1983 Orthogonal rational functions on the real half line with poles in \([-\infty,0]\). Zbl 1068.42022Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 8 2005 Asymptotics for orthogonal rational functions. Zbl 0814.42012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 8 1994 A Favard theorem for rational functions. Zbl 0721.30025Hendriksen, Erik; Njåstad, Olav 8 1989 Quadrature formulas on the unit circle and two-point Padé approximation. Zbl 0803.41036Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 8 1994 An extended Hamburger moment problem. Zbl 0557.30032Njåstad, Olav 7 1985 On the convergence of multipoint Padé-type approximants and quadrature formulas associated with the unit circle. Zbl 0864.41016Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 7 1996 On real-valued proximity mappings. Zbl 0121.39401Njåstad, Olav 7 1964 Extremal solutions of the strong Stieltjes moment problem. Zbl 0857.44003Njåstad, Olav 7 1995 Szegö functions and multipoint Padé approximation. Zbl 0721.30027González-Vera, Pablo; Njåstad, Olav 7 1990 Rational quadrature formulas on the unit circle with prescribed nodes and maximal domain of validity. Zbl 1203.65054Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 7 2010 Computation of rational Szegő-Lobatto quadrature formulas. Zbl 1203.65055Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 7 2010 Remarks on topologies defined by local properties. Zbl 0148.16504Njåstad, Olav 7 1966 Positive multipoint Padé continued fractions. Zbl 0647.30001Hendriksen, Erik; Njåstad, Olav 7 1989 An indeterminate rational moment problem and Carathéodory functions. Zbl 1149.30001Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 2008 Orthogonal rational functions and nested disks. Zbl 0878.42012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1997 Totality of uniform structures with linearly ordered base. Zbl 0117.39901Alfsen, Erik M.; Njåstad, Olav 6 1963 Orthogonal rational functions and continued fractions. Zbl 0995.42017Bultheel, Adhemar; Gonzalez-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 2001 A Favard theorem for rational functions with poles on the unit circle. Zbl 0893.33004Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1997 Biorthogonal Laurent polynomials with biorthogonal derivatives. Zbl 0763.33004Hendriksen, Erik; Njåstad, Olav 6 1991 A moment problem associated to rational Szegö functions. Zbl 0781.30030Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1992 Asymptotics of zeros of orthogonal and para-orthogonal Szegö polynomials in frequency analysis. Zbl 0818.33005Jones, William B.; Njåstad, Olav; Waadeland, Haakon 6 1994 Orthogonality and recurrence for ordered Laurent polynomial sequences. Zbl 1202.30006Díaz-Mendoza, C.; González-Vera, P.; Jiménez Paiz, M.; Njåstad, O. 6 2010 Perron-Carathéodory continued fractions. Zbl 0652.40003Jones, William B.; Njåstad, Olav; Thron, W. J. 6 1986 A density problem for orthogonal rational functions. Zbl 0944.30021Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1999 Rates of convergence of multipoint rational approximants and quadrature formulas on the unit circle. Zbl 0867.41012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1997 Some properties of proximity and generalized uniformity. Zbl 0121.17502Njåstad, Olav 5 1963 Proximity and generalized uniformity. Zbl 0122.41401Alfsen, Erik M.; Njåstad, Olav 5 1963 Orthogonal rational functions and modified approximants. Zbl 0845.30025Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1996 Domain of validity of Szegő quadrature formulas. Zbl 1109.41020Njåstad, O.; Santos-León, J. C. 5 2007 A class of indeterminate strong Stieltjes moment problems with discrete distributions. Zbl 0979.44005Bonan-Hamada, Catherine M.; Jones, William B.; Thron, W. J.; Njåstad, Olav 5 1998 Convergence properties related to \(p\)-point Padé approximants of Stieltjes transforms. Zbl 0780.41012Njåstad, Olav 5 1993 Application of Szegö polynomials to frequency analysis. Zbl 0798.33008Jones, William B.; Njåstad, Olav; Waadeland, Haakon 5 1994 Determinacy of a rational moment problem. Zbl 0997.44005Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 5 2001 Unique solvability of an extended Hamburger moment problem. Zbl 0654.42024Njåstad, Olav 5 1987 A rational Stieltjes moment problem. Zbl 1055.30031Bultheel, A.; Gonzalez-Vera, P.; Hendriksen, E.; Njåstad, Olav 4 2002 Orthogonal rational functions and interpolatory product rules on the unit circle. I: Recurrence and interpolation. Zbl 0929.30026Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1998 Continued fractions and orthogonal rational functions. Zbl 0930.30004Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1998 Szegő quadrature and frequency analysis. Zbl 1122.41017Daruis, Leyla; Njåstad, Olav; Van Assche, Walter 4 2005 Multipoint Padé approximation and orthogonal rational functions. Zbl 0721.30003Njåstad, Olav 4 1988 A modified Schur algorithm and an extended Hamburger moment problem. Zbl 0729.30036Njåstad, Olav 4 1991 Orthogonality and boundary interpolation. Zbl 0807.41002Bultheel, Adhemar; Gonzalez-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1994 Interpolation by rational functions with nodes on the unit circle. Zbl 0966.30031Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 2000 Sequences of orthogonal Laurent polynomials, bi-orthogonality and quadrature formulas on the unit circle. Zbl 1119.41025Cruz-Barroso, Ruymán; Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 4 2007 Completely convergent APT-fractions and strong Hamburger moment problems with unique solutions. Zbl 0625.30006Njåstad, Olav; Thron, W. J. 4 1984 Nevanlinna matrices for the strong Hamburger moment problem. Zbl 1038.30014Njåstad, O. 3 2003 Laurent continued fractions corresponding to pairs of power series. Zbl 0689.30006Njåstad, Olav 3 1988 Orthogonal rational functions on the unit circle: from the scalar to the matrix case. Zbl 1142.42010Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 3 2006 Natural solutions of indeterminate strong Stieltjes moment problems derived from PC-fractions. Zbl 0933.30006Bonan-Hamada, Catherine M.; Jones, William B.; Njåstad, Olav 3 1998 Remarks on canonical solutions of strong moment problems 4. Zbl 0926.44003Njåstad, Olav 3 1998 On uniform spaces where all uniformly continuous functions are bounded. Zbl 0145.19502Njåstad, Olav 3 1965 Solution of the strong Hamburger moment problem by Laurent continued fractions. Zbl 0658.44007Njåstad, Olav 3 1988 Asymptotic expansions and contractive Laurent fractions. Zbl 0601.30006Njåstad, Olav 2 1988 Analytic functions associated with strong hamburger moment problems. Zbl 1165.30010Njåstad, Olav 2 2009 Positivity of continued fractions associated with rational Stieltjes moment problems. Zbl 1053.30005Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 2 2003 Contractive Laurent fractions and nested discs. Zbl 0679.40002Njåstad, Olav 2 1989 A survey of some results on separate convergence of continued fractions. Zbl 0683.40002Njåstad, Olav 2 1989 A note on compactification by bounding systems. Zbl 0134.18701Njåstad, Olav 2 1965 Radau and Lobatto-type quadratures associated with strong Stieltjes distributions. Zbl 1312.65034Díaz Mendoza, C.; González Vera, P.; Jiménez Paiz, M.; Njåstad, O. 1 2015 Quadratures associated with pseudo-orthogonal rational functions on the real half line with poles in \([-\infty,0]\). Zbl 1262.65041Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 2 2013 Natural solutions of rational Stieltjes moment problems. Zbl 1211.44006Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 1 2011 Rational quadrature formulas on the unit circle with prescribed nodes and maximal domain of validity. Zbl 1203.65054Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 7 2010 Computation of rational Szegő-Lobatto quadrature formulas. Zbl 1203.65055Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 7 2010 Orthogonality and recurrence for ordered Laurent polynomial sequences. Zbl 1202.30006Díaz-Mendoza, C.; González-Vera, P.; Jiménez Paiz, M.; Njåstad, O. 6 2010 Growth properties of Nevanlinna matrices for rational moment problems. Zbl 1210.44003Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 2 2010 Zeros of orthogonal Laurent polynomials and solutions of strong Stieltjes moment problems. Zbl 1206.44003Bonan-Hamada, C.; Jones, W. B.; Njåstad, O. 1 2010 Analytic functions associated with strong hamburger moment problems. Zbl 1165.30010Njåstad, Olav 2 2009 Wall rational functions and Khrushchev’s formula for orthogonal rational functions. Zbl 1171.42308Njåstad, O.; Velázquez, L. 1 2009 Orthogonal rational functions. Reprint of the 1999 hardback ed. Zbl 1205.42024Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 1 2009 An indeterminate rational moment problem and Carathéodory functions. Zbl 1149.30001Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 2008 Sequences of orthogonal Laurent polynomials, bi-orthogonality and quadrature formulas on the unit circle. Zbl 1136.42020Cruz-Barroso, Ruymán; Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 16 2007 On bi-orthogonal systems of trigonometric functions and quadrature formulas for periodic integrands. Zbl 1129.65014Cruz-Barroso, Ruymán; González-Vera, Pablo; Njåstad, Olav 10 2007 Domain of validity of Szegő quadrature formulas. Zbl 1109.41020Njåstad, O.; Santos-León, J. C. 5 2007 Sequences of orthogonal Laurent polynomials, bi-orthogonality and quadrature formulas on the unit circle. Zbl 1119.41025Cruz-Barroso, Ruymán; Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 4 2007 Orthogonal rational functions on the unit circle: from the scalar to the matrix case. Zbl 1142.42010Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 3 2006 Quadrature rules for periodic integrands. Bi-orthogonality and para-orthogonality. Zbl 1108.41017Cruz-Barrosó, Ruymán; Daruisa, Leyla; González-Vera, Pablo; Njastad, Olav 12 2005 Orthogonal rational functions on the real half line with poles in \([-\infty,0]\). Zbl 1068.42022Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 8 2005 Szegő quadrature and frequency analysis. Zbl 1122.41017Daruis, Leyla; Njåstad, Olav; Van Assche, Walter 4 2005 Separation of zeros of para-orthogonal rational functions. Zbl 1129.42406Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 1 2005 Orthogonal rational functions and tridiagonal matrices. Zbl 1014.42017Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 69 2003 Orthogonal rational functions and quadrature on the real half line. Zbl 1049.42012Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 10 2003 Para-orthogonal polynomials in frequency analysis. Zbl 1042.94001Daruis, Leyla; Njåstad, Olav; Van Assche, Walter 10 2003 Nevanlinna matrices for the strong Hamburger moment problem. Zbl 1038.30014Njåstad, O. 3 2003 Positivity of continued fractions associated with rational Stieltjes moment problems. Zbl 1053.30005Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 2 2003 Szegö quadrature formulas for certain Jacobi-type weight functions. Zbl 0989.41015Daruis, Leyla; González-Vera, Pablo; Njåstad, Olav 13 2002 A rational Stieltjes moment problem. Zbl 1055.30031Bultheel, A.; Gonzalez-Vera, P.; Hendriksen, E.; Njåstad, Olav 4 2002 Quadrature and orthogonal rational functions. Zbl 0970.41020Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, Olav 13 2001 Orthogonal rational functions and continued fractions. Zbl 0995.42017Bultheel, Adhemar; Gonzalez-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 2001 Determinacy of a rational moment problem. Zbl 0997.44005Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 5 2001 Orthogonal rational functions and interpolatory product rules on the unit circle. III: Convergence of general sequences. Zbl 0979.41019Bultheel, A.; González-Vera, P.; Hendriksen, E.; Njåstad, O. 15 2000 Interpolation by rational functions with nodes on the unit circle. Zbl 0966.30031Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 2000 Orthogonal rational functions. Zbl 0923.42017Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 46 1999 Orthogonal Laurent polynomials and strong moment theory: A survey. Zbl 0943.30024Jones, William B.; Njåstad, Olav 27 1999 A density problem for orthogonal rational functions. Zbl 0944.30021Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1999 Elements of a theory of orthogonal rational functions. Zbl 1029.42019Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 2 1999 Orthogonal rational functions and interpolatory product rules on the unit circle. II: Quadrature and convergence. Zbl 0929.30027Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 13 1998 A class of indeterminate strong Stieltjes moment problems with discrete distributions. Zbl 0979.44005Bonan-Hamada, Catherine M.; Jones, William B.; Thron, W. J.; Njåstad, Olav 5 1998 Orthogonal rational functions and interpolatory product rules on the unit circle. I: Recurrence and interpolation. Zbl 0929.30026Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1998 Continued fractions and orthogonal rational functions. Zbl 0930.30004Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1998 Natural solutions of indeterminate strong Stieltjes moment problems derived from PC-fractions. Zbl 0933.30006Bonan-Hamada, Catherine M.; Jones, William B.; Njåstad, Olav 3 1998 Remarks on canonical solutions of strong moment problems 4. Zbl 0926.44003Njåstad, Olav 3 1998 Nevanlinna matrices for the strong Stieltjes moment problem. Zbl 0929.44003Njåstad, Olav 2 1998 Interpolation of Nevanlinna functions by rationals with poles on the real line. Zbl 0928.30018Bultheel, Adhemar; Gonzáles-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 2 1998 A rational moment problem on the unit circle. Zbl 0905.30030Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 11 1997 Generalized Szegö theory in frequency analysis. Zbl 0872.42006Njåstad, Olav; Waadeland, Haakon 10 1997 Asymptotic properties of zeros of orthogonal rational functions. Zbl 0864.42010Njåstad, Olav; Waadeland, Haakon 9 1997 Orthogonal rational functions and nested disks. Zbl 0878.42012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1997 A Favard theorem for rational functions with poles on the unit circle. Zbl 0893.33004Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1997 Rates of convergence of multipoint rational approximants and quadrature formulas on the unit circle. Zbl 0867.41012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1997 Some results about numerical quadrature on the unit circle. Zbl 0856.41025González-Vera, Pablo; Santos-León, J. C.; Njåstad, Olav 35 1996 Solutions of the strong Hamburger moment problem. Zbl 0853.44004Njåstad, Olav 12 1996 On the convergence of multipoint Padé-type approximants and quadrature formulas associated with the unit circle. Zbl 0864.41016Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 7 1996 Orthogonal rational functions and modified approximants. Zbl 0845.30025Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 5 1996 Solutions of the strong Stieltjes moment problem. Zbl 0841.30033Njåstad, Olav 11 1995 Extremal solutions of the strong Stieltjes moment problem. Zbl 0857.44003Njåstad, Olav 7 1995 Convergence of modified approximants associated with orthogonal rational functions. Zbl 0898.42008Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 2 1995 Convergence of orthogonal rational functions. Zbl 0872.33006Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 1 1995 Favard theorem for reproducing kernels. Zbl 0851.30001Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 1 1995 Recurrence relations for orthogonal functions. Zbl 0813.30007Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 17 1994 Orthogonal rational functions with poles on the unit circle. Zbl 0796.33003Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 16 1994 An alternative way of using Szegö polynomials in frequency analysis. Zbl 0818.33004Jones, William B.; Njåstad, Olav; Waadeland, Haakon 16 1994 Quadrature formulas on the unit circle based on rational functions. Zbl 0809.41027Bultheel, Adhemar; Hendriksen, Erik; González-Vera, Pablo; Njåstad, Olav 11 1994 Asymptotics for orthogonal rational functions. Zbl 0814.42012Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 8 1994 Quadrature formulas on the unit circle and two-point Padé approximation. Zbl 0803.41036Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 8 1994 Asymptotics of zeros of orthogonal and para-orthogonal Szegö polynomials in frequency analysis. Zbl 0818.33005Jones, William B.; Njåstad, Olav; Waadeland, Haakon 6 1994 Application of Szegö polynomials to frequency analysis. Zbl 0798.33008Jones, William B.; Njåstad, Olav; Waadeland, Haakon 5 1994 Orthogonality and boundary interpolation. Zbl 0807.41002Bultheel, Adhemar; Gonzalez-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 4 1994 Szegő polynomials applied to frequency analysis. Zbl 0784.65105Jones, William B.; Thron, W. J.; Njåstad, Olav; Waadeland, Haakon 27 1993 Moment problems and orthogonal functions. Zbl 0795.33003Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 18 1993 Convergence properties related to \(p\)-point Padé approximants of Stieltjes transforms. Zbl 0780.41012Njåstad, Olav 5 1993 Orthogonal rational functions on the unit circle and the real line. Zbl 0824.30023Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 1 1993 The computation of orthogonal rational functions and their interpolating properties. Zbl 0758.65009Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 26 1992 Orthogonal rational functions and quadrature on the unit circle. Zbl 0786.42011Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 18 1992 A Favard theorem for orthogonal rational functions on the unit circle. Zbl 0786.42010Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 12 1992 A moment problem associated to rational Szegö functions. Zbl 0781.30030Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 6 1992 Asymptotics for Szegö polynomial zeros. Zbl 0791.65107Jones, William B.; Njåstad, Olav; Waadeland, Haakon 2 1992 Applications of Szegö polynomials to digital signal processing. Zbl 0729.94002Jones, William B.; Njåstad, Olav 19 1991 Orthogonality and quadrature on the unit circle. Zbl 0830.30022Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 14 1991 Orthogonal rational functions similar to Szegö polynomials. Zbl 0829.42020Bultheel, Adhemar; González-Vera, Pablo; Hendriksen, Erik; Njåstad, Olav 12 1991 Biorthogonal Laurent polynomials with biorthogonal derivatives. Zbl 0763.33004Hendriksen, Erik; Njåstad, Olav 6 1991 A modified Schur algorithm and an extended Hamburger moment problem. Zbl 0729.30036Njåstad, Olav 4 1991 Szegö polynomials associated with Wiener-Levinson filters. Zbl 0718.94002Jones, William B.; Njåstad, Olav; Saff, E. B. 26 1990 Convergence of two-point Padé approximants to series of Stieltjes. Zbl 0721.30026González-Vera, Pablo; Njåstad, Olav 19 1990 Szegö functions and multipoint Padé approximation. Zbl 0721.30027González-Vera, Pablo; Njåstad, Olav 7 1990 Convergence of the Schur algorithm. Zbl 0735.30034Njåstad, Olav 2 1990 Strongly bounded holomorphic functions and corresponding PC-fractions. Zbl 0715.30006Njåstad, Olav; Waadeland, Haakon 1 1990 Moment theory, orthogonal polynomials, quadrature, and continued fractions associated with the unit circle. Zbl 0637.30035Jones, William B.; Njåstad, Olav; Thron, W. J. 171 1989 A Favard theorem for rational functions. Zbl 0721.30025Hendriksen, Erik; Njåstad, Olav 8 1989 Positive multipoint Padé continued fractions. Zbl 0647.30001Hendriksen, Erik; Njåstad, Olav 7 1989 Contractive Laurent fractions and nested discs. Zbl 0679.40002Njåstad, Olav 2 1989 A survey of some results on separate convergence of continued fractions. Zbl 0683.40002Njåstad, Olav 2 1989 Laurent polynomials and Gaussian quadrature. Zbl 0707.41031Njåstad, Olav 2 1989 Some remarks on nearness problems for continued fraction expansions. Zbl 0679.40001Njåstad, Olav; Waadeland, Haakon 1 1989 Multipoint Padé approximation and orthogonal rational functions. Zbl 0721.30003Njåstad, Olav 4 1988 Laurent continued fractions corresponding to pairs of power series. Zbl 0689.30006Njåstad, Olav 3 1988 Solution of the strong Hamburger moment problem by Laurent continued fractions. Zbl 0658.44007Njåstad, Olav 3 1988 Asymptotic expansions and contractive Laurent fractions. Zbl 0601.30006Njåstad, Olav 2 1988 Unique solvability of an extended Stieltjes moment problem. Zbl 0647.30031Njåstad, Olav 2 1988 ...and 24 more Documents all cited Publications top 5 cited Publications all top 5 Cited by 554 Authors 67 González-Vera, Pablo 66 Bultheel, Adhemar François 65 Njåstad, Olav 38 Noiri, Takashi 37 Sri Ranga, Alagacone 31 Hendriksen, Erik 19 Jones, William Branham 18 Cruz-Barroso, Ruymán 17 Lasarow, Andreas 16 Díaz-Mendoza, Carlos 15 Reichel, Lothar 14 Bracciali, Cleonice Fátima 14 Deckers, Karl 14 Marcellán Español, Francisco 12 Berriochoa, Elías 12 Cachafeiro, Alicia 12 Daruis, Leyla 12 Popa, Valeriu 12 Van Deun, Joris 10 Orive Rodríguez, Ramón Angel 10 Thron, Wolfgang Joseph 9 Ekici, Erdal 9 Jafari, Saeid 9 Nasef, Arafa A. 9 Waadeland, Haakon 8 Cantero, María José 8 Jiménez Paiz, Mateo M. 8 Perdomo-Pío, Francisco 8 Petersen, Vigdis Brevik 7 Castillo, Kenier 7 Jagels, Carl F. 7 McCabe, John H. 7 Santos-León, Juan-Carlos 6 Al-Omari, Ahmad Abdullah 6 Di Concilio, Anna 6 Fritzsche, Bernd 6 Hagler, Brian A. 6 Kirstein, Bernd 6 Lamblém, Regina Litz 6 Lubinsky, Doron S. 6 Simon, Barry 6 Száz, Árpád 6 Tyagi, Brij Kishore 6 Velázquez, Luis 6 Zhedanov, Alexei S. 5 Bhardwaj, Manoj 5 Boonpok, Chawalit 5 Cooper, S. Clement 5 Costa, Marisa S. 5 Derevyagin, Maxim S. 5 Ibrahim, Hariwan Zikri 5 Modak, Shyamapada 5 Moral, Leandro 5 Naimpally, Somashekhar Amrith 5 Reilly, Ivan Leon 5 Sarsak, Mohammad S. 5 Simanek, Brian Z. 5 Singh, Sumit 5 Van Barel, Marc 5 Veronese, Daniel O. 4 Behera, Kiran Kumar 4 Bonan-Hamada, Catherine M. 4 de Andrade, Eliana X. L. 4 García-Amor, José M. 4 Hušek, Miroslav 4 Li, Xin 4 Sivaraj, D. 4 Van Assche, Walter 4 Yuksel, Saziye 3 Abu-Donia, Hassan Mustafa 3 Acikgoz, Ahu 3 Cuyt, Annie A. M. 3 Ganster, Maximilian 3 Garza, Luis E. 3 Godoy, Eduardo Paciência 3 Guadagni, Clara 3 Gustafson, Philip E. 3 Hamburger, Peter 3 Khalaf, Alias Barakat 3 Kiliçman, Adem 3 Magnus, Arne 3 Mañas, Manuel 3 Martínez-Finkelshtein, Andrei 3 Milovanović, Gradimir V. 3 Park, Jin Han 3 Przemski, Marian 3 Qian, Tao 3 Rassias, Themistocles Michael 3 Roy, Bishwambhar 3 Stanić, Marija P. 3 Talabeigi, Amin 3 Tokarzewski, Stanisław 3 Verdonk, Brigitte M. 2 Abbas, Mohamed I. 2 Akçay, Hüseyin 2 Akdağ, Metin 2 Al-Shami, Tareq Mohammed 2 Al-Zoubi, Khalid Y. 2 Alfaro, María Pilar 2 Alò, Richard A. ...and 454 more Authors all top 5 Cited in 159 Serials 110 Journal of Computational and Applied Mathematics 43 Acta Mathematica Hungarica 34 Journal of Approximation Theory 31 Numerical Algorithms 30 Journal of Mathematical Analysis and Applications 28 Chaos, Solitons and Fractals 23 Rocky Mountain Journal of Mathematics 17 Mathematics of Computation 15 Applied Numerical Mathematics 15 Linear Algebra and its Applications 14 Rendiconti del Circolo Matemàtico di Palermo. Serie II 10 International Journal of Mathematics and Mathematical Sciences 9 Applied Mathematics and Computation 9 Topology and its Applications 8 Mathematische Nachrichten 8 Proceedings of the American Mathematical Society 8 Filomat 8 Boletim da Sociedade Paranaense de Matemática. Terceira Série 7 Fuzzy Sets and Systems 7 Numerische Mathematik 7 Journal of the Egyptian Mathematical Society 6 Demonstratio Mathematica 6 Mathematica Slovaca 6 Constructive Approximation 5 Computers & Mathematics with Applications 5 Advances in Mathematics 5 Transactions of the American Mathematical Society 5 Acta Applicandae Mathematicae 5 South East Asian Journal of Mathematics and Mathematical Sciences 5 Applied General Topology 4 Proceedings of the Edinburgh Mathematical Society. Series II 4 European Journal of Pure and Applied Mathematics 3 Bulletin of the Australian Mathematical Society 3 Journal d’Analyse Mathématique 3 Periodica Mathematica Hungarica 3 Fasciculi Mathematici 3 Numerical Functional Analysis and Optimization 3 Journal of Complexity 3 Computational and Applied Mathematics 3 Integral Transforms and Special Functions 3 Analysis (München) 3 Journal of the Australian Mathematical Society 3 JP Journal of Geometry and Topology 3 Proyecciones 3 Afrika Matematika 3 Journal of Linear and Topological Algebra 2 Acta Mathematica Academiae Scientiarum Hungaricae 2 Journal of Statistical Physics 2 Mathematical Notes 2 Annali di Matematica Pura ed Applicata. Serie Quarta 2 Automatica 2 Calcolo 2 Commentationes Mathematicae Universitatis Carolinae 2 Czechoslovak Mathematical Journal 2 Journal of Functional Analysis 2 Mathematische Annalen 2 Mathematische Zeitschrift 2 Monatshefte für Mathematik 2 SIAM Journal on Matrix Analysis and Applications 2 SIAM Journal on Mathematical Analysis 2 Tatra Mountains Mathematical Publications 2 Applied and Computational Harmonic Analysis 2 Abstract and Applied Analysis 2 Communications de la Faculté des Sciences de l’Université d’Ankara. Séries A1. Mathematics and Statistics 2 Applied Sciences 2 Computational Methods and Function Theory 2 Hacettepe Journal of Mathematics and Statistics 2 Thai Journal of Mathematics 2 Cubo 2 Boundary Value Problems 2 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications 2 Advances in Fuzzy Systems 2 Journal of Advanced Studies in Topology 2 Iranian Journal of Mathematical Sciences and Informatics 2 Palestine Journal of Mathematics 2 Journal of Mathematics 2 Cogent Mathematics 1 Communications in Mathematical Physics 1 Journal of Computational Physics 1 Journal of Mathematical Physics 1 Mathematical Methods in the Applied Sciences 1 Ukrainian Mathematical Journal 1 Wave Motion 1 Arkiv för Matematik 1 Duke Mathematical Journal 1 Functiones et Approximatio. Commentarii Mathematici 1 Glasgow Mathematical Journal 1 Integral Equations and Operator Theory 1 Journal of Soviet Mathematics 1 Matematički Vesnik 1 Publications of the Research Institute for Mathematical Sciences, Kyoto University 1 Quaestiones Mathematicae 1 Ricerche di Matematica 1 Semigroup Forum 1 Siberian Mathematical Journal 1 Studia Logica 1 Studies in Applied Mathematics 1 Systems & Control Letters 1 Advances in Mathematics 1 Japan Journal of Applied Mathematics ...and 59 more Serials all top 5 Cited in 51 Fields 266 General topology (54-XX) 201 Harmonic analysis on Euclidean spaces (42-XX) 140 Approximations and expansions (41-XX) 122 Functions of a complex variable (30-XX) 114 Numerical analysis (65-XX) 107 Special functions (33-XX) 32 Operator theory (47-XX) 30 Linear and multilinear algebra; matrix theory (15-XX) 28 Integral transforms, operational calculus (44-XX) 26 Information and communication theory, circuits (94-XX) 14 Sequences, series, summability (40-XX) 13 Functional analysis (46-XX) 10 Dynamical systems and ergodic theory (37-XX) 9 Real functions (26-XX) 9 Ordinary differential equations (34-XX) 9 Systems theory; control (93-XX) 7 Order, lattices, ordered algebraic structures (06-XX) 7 Computer science (68-XX) 6 Mathematical logic and foundations (03-XX) 5 Topological groups, Lie groups (22-XX) 5 Measure and integration (28-XX) 5 Probability theory and stochastic processes (60-XX) 4 Partial differential equations (35-XX) 4 Abstract harmonic analysis (43-XX) 4 Statistical mechanics, structure of matter (82-XX) 3 Combinatorics (05-XX) 3 Number theory (11-XX) 3 Potential theory (31-XX) 3 Global analysis, analysis on manifolds (58-XX) 3 Statistics (62-XX) 2 General and overarching topics; collections (00-XX) 2 Category theory; homological algebra (18-XX) 2 Manifolds and cell complexes (57-XX) 2 Fluid mechanics (76-XX) 2 Optics, electromagnetic theory (78-XX) 1 General algebraic systems (08-XX) 1 Field theory and polynomials (12-XX) 1 Commutative algebra (13-XX) 1 Algebraic geometry (14-XX) 1 Associative rings and algebras (16-XX) 1 Nonassociative rings and algebras (17-XX) 1 Group theory and generalizations (20-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Difference and functional equations (39-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Differential geometry (53-XX) 1 Mechanics of deformable solids (74-XX) 1 Quantum theory (81-XX) 1 Geophysics (86-XX) 1 Operations research, mathematical programming (90-XX) 1 Biology and other natural sciences (92-XX) Citations by Year