Researcher Portfolio
Onwunta, Akwum
Computational Methods in Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, International Max Planck Research School (IMPRS), Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society
Researcher Profile
Position: International Max Planck Research School (IMPRS), Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society
Position: Computational Methods in Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society
Researcher ID: https://pure.mpg.de/cone/persons/resource/persons130597
Publications
: Benner, P., Onwunta, A., & Stoll, M. (2019). A Low-Rank Inexact Newton-Krylov Method for Stochastic Eigenvalue Problems. Computational Methods in Applied Mathematics, 19(1), 5-22. doi:10.1515/cmam-2018-0030. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (in preparation). On the Existence and Uniqueness of the Solution of a Parabolic Optimal Control Problem with Uncertain Inputs. [PubMan] : Benner, P., Dolgov, S., Onwunta, A., & Stoll, M. (in preparation). Solving Optimal Control Problems governed by Random Navier-Stokes Equations using Low-Rank Methods. [PubMan] : Onwunta, A. (2016). Low-Rank Iterative Solvers for Large-Scale Stochastic Galerkin Linear Systems. PhD Thesis, Otto-von-Guericke Universität, Magdeburg. [PubMan] : Onwunta, A. (2016). Block-Diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. Talk presented at SIAM Conference on Uncertainty Quantification. Lausanne, Switzerland. 2016-04-05 - 2016-04-08. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2016). Block-diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. SIAM Journal on Matrix Analysis and Applications, 37(2), 491-518. doi:10.1137/15M1018502. [PubMan] : Onwunta, A., Benner, P., & Stoll, M. (2016). Efficient solvers for optimal control problems constrained by PDEs with uncertain inputs. Talk presented at 20th Conference of the International Linear Algebra Society (ILAS). Leuven, Belgium. 2016-07-11 - 2016-07-16. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2016). Fast Solvers for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. Talk presented at Computational Methods in Applied Mathematics (CMAM-7). Jyväskylä, Finland. 2016-07-31 - 2016-08-06. [PubMan] : Onwunta, A., Benner, P., & Stoll, M. (2015). Efficient solvers for optimal control problems constrained by PDEs with uncertain inputs. Talk presented at Workshop on Direct and Inverse Problems for PDEs with Random Coefficients. Berlin, Germany. 2015-11-09 - 2015-11-13. [PubMan] : Benner, P., Dolgov, S., Onwunta, A., & Stoll, M. (2016). Low-Rank Solvers for Unsteady Stokes-Brinkman Optimal Control Problem with Random Data. Computer Methods in Applied Mechanics and Engineering, 304, 26-54. doi:10.1016/j.cma.2016.02.004. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2016). Block-diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. Talk presented at 87th annual conference of the International Association of Applied Mathematics and Mechanics. Braunschweig, Germany. 2016-03-07 - 2016-03-11. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2015). Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. SIAM/ASA Journal on Uncertainty Quantification, 3(1), 622-649. doi:10.1137/130937251. [PubMan] : Onwunta, A., Stoll, M., & Benner, P. (2015). All-at-once Approach to Optimal Control Problems Constrained by PDEs with Uncertain Inputs. Talk presented at SIAM Conference on Computational Science and Engineering. Salt Lake City, Utah, United States. 2015-03-14 - 2015-03-18. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2014). Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. Talk presented at SIAM Conference on Uncertainty Quantification. Savannah, Georgia, USA. 2014-03-31 - 2014-04-03. [PubMan] : Benner, P., Onwunta, A., & Stoll, M. (2014). Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. Talk presented at 85th GAMM Annual Scientific Conference. Erlangen, Germany. 2014-03-10 - 2014-03-14. [PubMan]