Multivariable generalizations of the Schur class: positive kernel characterization and transfer function realization JA Ball, Q Fang, S Horst, A Biswas Recent Advances in Operator Theory and Applications, 17-79, 2009 | 26 | 2009 |

A constrained Nevanlinna-Pick interpolation problem for matrix-valued functions JA Ball, V Bolotnikov, S ter Horst Indiana Univ. Math. J. 59 (no. 1), 15–51, 2010 | 22 | 2010 |

Equivalence after extension and matricial coupling coincide with Schur coupling, on separable Hilbert spaces S Ter Horst, ACM Ran Linear Algebra and its Applications 439 (3), 793-805, 2013 | 21 | 2013 |

All solutions to the relaxed commutant lifting problem AE Frazho, S Ter Horst, MA Kaashoek Acta Sci. Math. (Szeged) 72, 299–318, 2006 | 21 | 2006 |

Coupling and relaxed commutant lifting AE Frazho, S Horst, MA Kaashoek Integral Equations and Operator Theory 54 (1), 33-67, 2006 | 19 | 2006 |

Robust control, multidimensional systems and multivariable Nevanlinna-Pick interpolation JA Ball, S Horst, S Horst Topics in Operator Theory, 13-88, 2010 | 17 | 2010 |

Equivalence after extension for compact operators on Banach spaces S ter Horst, M Messerschmidt, ACM Ran Journal of Mathematical Analysis and Applications 431 (1), 136-149, 2015 | 15 | 2015 |

Multivariable operator-valued Nevanlinna-Pick interpolation: a survey JA Ball, S Horst Operator Algebras, Operator Theory and Applications, 1-72, 2010 | 15 | 2010 |

Bounded real lemma and structured singular value versus diagonal scaling: the free noncommutative setting JA Ball, G Groenewald, S Ter Horst Multidimensional Systems and Signal Processing 27 (1), 217-254, 2016 | 14 | 2016 |

Interpolation in de Branges-Rovnyak spaces J Ball, V Bolotnikov, S Ter Horst Proceedings of the American Mathematical Society 139 (2), 609-618, 2011 | 14 | 2011 |

Equivalence after extension and Schur coupling coincide for inessential operators S Ter Horst, M Messerschmidt, ACM Ran, M Roelands, M Wortel Indagationes Mathematicae 29 (5), 1350-1361, 2018 | 10 | 2018 |

Standard versus strict Bounded Real Lemma with infinite-dimensional state space II: The storage function approach JA Ball, GJ Groenewald, S Ter Horst The diversity and beauty of applied operator theory, 1-50, 2018 | 10 | 2018 |

A Toeplitz-like operator with rational symbol having poles on the unit circle I: Fredholm properties GJ Groenewald, S Ter Horst, J Jaftha, ACM Ran Operator Theory, Analysis and the State Space Approach: In Honor of Rien …, 2018 | 10 | 2018 |

State space formulae for stable rational matrix solutions of a Leech problem AE Frazho, S ter Horst, MA Kaashoek Indagationes Mathematicae 25 (2), 250-274, 2014 | 10 | 2014 |

A Toeplitz-like operator with rational symbol having poles on the unit circle II: the spectrum GJ Groenewald, S Ter Horst, J Jaftha, ACM Ran Interpolation and Realization Theory with Applications to Control Theory: In …, 2019 | 9 | 2019 |

Abstract interpolation in vector-valued de Branges–Rovnyak spaces JA Ball, V Bolotnikov, S ter Horst Integral Equations and Operator Theory 70 (2), 227-263, 2011 | 9 | 2011 |

Standard versus strict bounded real lemma with infinite-dimensional state space I: The state-space-similarity approach JA Ball, GJ Groenewald, S Ter Horst arXiv preprint arXiv:1804.08507, 2018 | 8 | 2018 |

Rational matrix solutions to the Leech equation: the Ball–Trent approach revisited S Ter Horst Journal of Mathematical Analysis and Applications 408 (1), 335-344, 2013 | 8 | 2013 |

Relaxed commutant lifting and a relaxed Nehari problem: Redheffer state space formulas S Horst Mathematische Nachrichten 282 (12), 1753-1769, 2009 | 8 | 2009 |

State space formulas for a suboptimal rational Leech problem I: Maximum entropy solution AE Frazho, S Ter Horst, MA Kaashoek Integral Equations and Operator Theory 79, 533-553, 2014 | 7 | 2014 |