Articles Appearing in Books

  1. J.A. Ball, A non-Euclidean Lax-Beurling theorem with applications to matricial Ne\-van\-lin\-na-Pick interpolation, in Toeplitz Centennial (Ed. I. Gohberg), OT 4, Birkhauser Verlag, Basel, 1981, pp. 67-84.
  2. J.A. Ball, Invariant subspace representations, unitary interpolants and factorization indices, in Topics in Operator Theory, Systems and Networks} (Ed. H. Dym and I. Gohberg), OT 12 Birkhauser Verlag, Basel, 1984, pp. 11-38.
  3. J.A. Ball and I. Gohberg, Classification of shift invariant subspaces of matrices with Hermitian form and completion of matrices, in Operator Theory and Systems (Ed. H. Bart, I. Gohberg and M.A. Kaashoek), OT 19 Birkhauser Verlag, Basel, pp. 23-85
  4. J.A. Ball and A.C.M. Ran, Left versus right canonical Wiener-Hopf factorization, in Constructive Methods of Wiener-Hopf Factorization (Ed. I. Gohberg and M.A. Kaashoek), OT 21 Birkhauser Verlag, Basel, 1987, pp. 9-38.
  5. J.A. Ball, Nevanlinna-Pick interpolation: generalizations and applications, in Recent Results in Operator Theory Vol. I (Ed. J.B. Conway and B.B. Morrel), Longman Scientific and Tech., Essex, 1988, pp. 51-94.
  6. J.A. Ball, I. Gohberg and L. Rodman, Realization and interpolation of rational matrix functions, in Topics in Interpolation Theory and Rational Matrix-Valued Functions} (Ed. I. Gohberg), OT 33 Birkhauser Verlag, Basel, 1988, pp. 1-72.
  7. J.A. Ball, N. Cohen and A.C.M. Ran, Inverse spectral problems for regular improper rational matrix functions, in Topics in Interpolation Theory and Rational Matrix-Valued Functions} (Ed. I. Gohberg), OT 33 Birkhauser Verlag, Basel, 1988, pp. 123-173.
  8. J.A. Ball and J.W. Helton, Shift invariant subspaces, passivity, reproducing kernels and $H^{\infty}$-optimization, in Contributions to Operator Theory and its Applications (Ed. J.W. Helton and L. Rodman), OT 35 Birkhauser Verlag, Basel, 1988, pp. 265-310.
  9. J.A. Ball and J.W. Helton, Factorization and general properties of nonlinear Toeplitz operators, in The Gohberg Anniversary Collection Vol. II} (Ed. H. Dym, S. Goldberg, M.A. Kaashoek and P. Lancaster), OT 41 Birkhauser Verlag, Basel, 1989, pp. 25-41.
  10. .A. Ball and M. Rakowski, Zero-pole structure of nonregular rational matrix functions, in Extension and Interpolation of Linear Operators and Matrix Functions (Ed. I. Gohberg), OT 47 Birkhauser Verlag, Basel, 1990, pp. 137-193.
  11. D. Alpay, J.A. Ball, I. Gohberg and L. Rodman, Realization and factorization for rational matrix functions with symmetries, in Extension and Interpolation of Linear Operators and Matrix Functions} (Ed. I. Gohberg), OT 47 Birkhauser Verlag, Basel, 1990, pp. 1-60.
  12. J.A. Ball and T.R. Fanney, Closability of differential operators and real subjordan operators, in Topics in Operator Theory: Ernst D. Hellinger Memorial Volume (Ed. L. de Branges, I. Gohberg and J. Rovnyak), OT 48 Birkhauser-Verlag, Basel, 1990, pp. 93-156.
  13. J.A. Ball, I. Gohberg and L. Rodman, Two-sided Nudelman interpolation problem for rational matrix functions, in Analysis and Partial Differential Equations} (Ed. C. Sadosky), Marcel-Dekker, New York-Basel, 1990, pp. 371-416.
  14. J.A. Ball, I. Gohberg and L. Rodman, Sensitivity minimization and bitangential Nevan\-linna-Pick interpolation in contour integral form, in Proceedings in Signal Processing Part II: Control Theory and Applications} (Ed. F.A. Gr\"unbaum et al), IMA Vol. in Math. and its Appl. Vol. 23, Springer-Verlag, New York, 1990, pp. 3-35.
  15. J.A. Ball, I. Gohberg and L. Rodman, Tangential interpolation problems for rational matrix functions, in Matrix Theory and Applications} (Ed. C.R. Johnson), Proc. Symposia in Applied Mathematics, Vol. 40, Amer. Math. Soc., Providence, 1990, pp. 59-86.
  16. J.A. Ball, I. Gohberg and L. Rodman, Two-sided Lagrange-Sylvester interpolation problems for rational matrix functions, in Operator Theory: Operator Algebras and Applications, (Ed. W. Arveson and R.G. Douglas), Proc. Symposia in Pure Mathematics Vol. 51, Amer. Math. Soc., Providence, 1990, pp. 17-83.
  17. J.A. Ball and N. Cohen, De Branges-Rovnyak operator models and systems theory: a survey, in Topics in Matrix and Operator Theory} (ed. H. Bart, I. Gohberg and M.A. Kaashoek), OT 50 Birkhauser Verlag, Basel, 1991, pp. 93-136.
  18. J.A. Ball, I. Gohberg and L. Rodman, The state space method in the study of interpolation by rational matrix functions, in Mathematical System Theory: The Influence of R.E. Kalman} (Ed. A.C. Antoulas), Springer-Verlag, New York, 1991, pp. 503-508.
  19. J.A. Ball, I. Gohberg and M.A. Kaashoek, Nevanlinna-Pick interpolation for time-varying input-output maps: the discrete case, in Time-Variant Systems and Interpolation} (Ed. I. Gohberg), OT 56 Birkhauser Verlag, Basel, 1992, pp. 1-51.
  20. J.A. Ball, I. Gohberg and M.A. Kaashoek, Nevanlinna-Pick interpolation for time-varying input-output maps: the continuous time case, in Time-Variant Systems and Interpolation} (Ed. I. Gohberg), OT 56 Birkhauser Verlag, Basel, 1992, pp. 52-89.
  21. J.A. Ball and M. Rakowski, Interpolation by rational matrix functions and stability of feedback systems: the 4-block case, in Workshop on Operator Theory and Complex Analysis} (Ed. T. Ando and I. Gohberg), OT 59 Birkhauser Verlag, Basel, 1992, pp. 96-142.
  22. J.A. Ball, I. Gohberg and M.A. Kaashoek, Reduction of the abstract four block problem to a Nehari problem, in Continuous and Discrete Fourier Transforms, Extension Problems and Wiener-Hopf Equations} (Ed. I. Gohberg), OT 58 Birkhauser Verlag, Basel, 1992, pp. 121-141.
  23. W.T. Ross and J.A. Ball, Weak-star limits of polynomials and their derivatives, in Contributions to Operator Theory and its Applications: The Tsuyoshi Ando Anniversary Volume} (Ed. T Furuta, I. Gohberg and T. Nakazi), OT 62 Birkhauser Verlag, Basel, 1993, pp. 165-175.
  24. J.A. Ball, I. Gohberg and M.A. Kaashoek, Bitangential interpolation for input-output operators of time-varying systems: the discrete time case, in New Aspects in Interpolation and Completion Theories} (Ed. I. Gohberg), OT 64 Birkhauser Verlag, Basel, 1993, pp. 33-72. \vskip .1in
  25. J.A. Ball, I. Gohberg and L. Rodman, Two-sided tangential interpolation of real rational matrix functions, in {\it New Aspects in Interpolation and Completion Theories} (Ed. I. Gohberg), OT 64 Birkhauser Verlag, Basel, 1993, pp. 73-102. \vskip .1in
  26. J.A. Ball, Conservative dynamical systems and nonlinear Livsic-Brodskii nodes, in Nonselfadjoint Operators and Related Topics: Workshop on Operator Theory and its Applications} (Ed. A. Feintuch and I. Gohberg), Birkhauser Verlag, 1994, pp. 67-95.
  27. J.A. Ball and J. Rosenthal, Pole placement, internal stabilization and interpolation conditions for rational matrix functions: a Grassmannian formulation, in Linear Algebra for Control Theory} (Ed. P. van Dooren and B.F. Wyman), IMA Volumes in Mathematics and its Applications Vol. 62, Springer Verlag, New York, 1994, pp. 21-30.
  28. J.A. Ball, I. Gohberg and M.A. Kaashoek, Input-output operators of $J$-unitary time-varying continuous time systems, in Operator Theory in Function Spaces and Banach Lattices: The A.C. Zaanen Anniversary Volume} (Ed. C.B. Huijsmans, M.A. Kaashoek, W.A.J. Luxemburg and B. de Pagter), OT 75 Birkhauser-Verlag, Basel, 1995, pp. 57-94.
  29. J.A. Ball, The nonlinear Nevanlinna-Pick interpolation problem, in Topics in Operator Theory, Operator Algebras and Applications} (Ed. A. Gheondea, S. Stratila and D. Timotin), Institute of the Romanian Academy, Bucharest, 1995, pp. 1-27.
  30. J.A. Ball, I. Gohberg and M.A. Kaashoek, The band method and Grassmannian approach for completion and extension problems, in Recent Advances in Operator Theory and its Applications} (Winnipeg, Manitoba, 1994) (Ed. I. Gohberg, P. Lancaster and P.N. Shivakumar), OT 87 Birkhauser-Verlag, Basel, 1996, pp. 17-60.
  31. J.A. Ball and T.T. Trent, The abstract interpolation problem and commutant lifting: a coordinate-free approach, to appear in Proceedings of IWOTA (Ed. H. Bercovici and C. Foias), Bloomington, Indiana, 1996.

Teaching Research Recent Publications Vitae