Low-rank solvers for unsteady Stokes–Brinkman optimal control problem with random data P Benner, S Dolgov, A Onwunta, M Stoll Computer Methods in Applied Mechanics and Engineering 304, 26-54, 2016 | 42 | 2016 |

Block-diagonal preconditioning for optimal control problems constrained by PDEs with uncertain inputs P Benner, A Onwunta, M Stoll SIAM Journal on Matrix Analysis and Applications 37 (2), 491-518, 2016 | 31 | 2016 |

Low-rank solution of unsteady diffusion equations with stochastic coefficients P Benner, A Onwunta, M Stoll SIAM/ASA Journal on Uncertainty Quantification 3 (1), 622-649, 2015 | 29 | 2015 |

Validating structural credit portfolio models M Kalkbrener, A Onwunta Model risk—identification, measurement and management. Risk Books, London …, 2010 | 15 | 2010 |

Solving optimal control problems governed by random Navier-Stokes equations using low-rank methods P Benner, S Dolgov, A Onwunta, M Stoll arXiv preprint arXiv:1703.06097, 2017 | 8 | 2017 |

A low-rank inexact Newton–Krylov method for stochastic eigenvalue problems P Benner, A Onwunta, M Stoll Computational Methods in Applied Mathematics 19 (1), 5-22, 2019 | 7 | 2019 |

Threshold accepting for credit risk assessment and validation M Lyra, A Onwunta, P Winker Journal of Banking Regulation 16 (2), 130-145, 2015 | 5 | 2015 |

On the existence and uniqueness of the solution of a parabolic optimal control problem with uncertain inputs P Benner, A Onwunta, M Stoll arXiv preprint arXiv:1809.10645, 2018 | 4 | 2018 |

Reduced-order modeling for nonlinear Bayesian statistical inverse problems HC Elman, A Onwunta arXiv preprint arXiv:1909.02539, 2019 | 1 | 2019 |

COMISEF WORKING PAPERS SERIES M Lyra, A Onwunta, P Winker | 1 | 2010 |

On the regularity of refinable functions AA Onwunta Stellenbosch: University of Stellenbosch, 2006 | 1 | 2006 |

Low‐rank solution of an optimal control problem constrained by random Navier‐Stokes equations P Benner, S Dolgov, A Onwunta, M Stoll International Journal for Numerical Methods in Fluids, 2020 | | 2020 |

Low-rank iterative solvers for large-scale stochastic Galerkin linear systems A Onwunta Otto-von-Guericke Universität Magdeburg, 2016 | | 2016 |

Block-Diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs A Onwunta SIAM Conference on Uncertainty Quantification, 2016 | | 2016 |

Efficient solvers for optimal control problems constrained by PDEs with uncertain inputs A Onwunta, P Benner, M Stoll Workshop on Direct and Inverse Problems for PDEs with Random Coefficients, 2016 | | 2016 |

Fast solvers for optimal control problems constrained by PDEs with uncertain inputs P Benner, A Onwunta, M Stoll 19th European Conference on Mathematics for Industry, 374, 2016 | | 2016 |

All-at-once Approach to Optimal Control Problems Constrained by PDEs with Uncertain Inputs A Onwunta, M Stoll, P Benner SIAM Conference on Computational Science and Engineering, 2015 | | 2015 |

On the Holder regularity of refinable functions A Onwunta South African Mathematical Society, Rhodes University, Mathematics (Pure and …, 2005 | | 2005 |

The Regularity of Refinable Functions with Positive Masks AA Onwunta University of Stellenbosch South Africa, 2004 | | 2004 |

MPI Magdeburg: Computational Methods in Systems and Control Theory: Teaching: MOR MI Ahmad, A Barker, U Baur, P Benner, J Bosch, Z Bujanovic, J Denißen, ... | | |