Publications of Akwum Onwunta
All genres
Journal Article (4)
2019
Journal Article
19 (1), pp. 5 - 22 (2019)
A Low-Rank Inexact Newton-Krylov Method for Stochastic Eigenvalue Problems. Computational Methods in Applied Mathematics 2016
Journal Article
304, pp. 26 - 54 (2016)
Low-Rank Solvers for Unsteady Stokes-Brinkman Optimal Control Problem with Random Data. Computer Methods in Applied Mechanics and Engineering
Journal Article
37 (2), pp. 491 - 518 (2016)
Block-diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. SIAM Journal on Matrix Analysis and Applications 2015
Journal Article
3 (1), pp. 622 - 649 (2015)
Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. SIAM/ASA Journal on Uncertainty Quantification Talk (8)
2016
Talk
Fast Solvers for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. Computational Methods in Applied Mathematics (CMAM-7), Jyväskylä, Finland (2016)
Talk
Block-diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. 87th annual conference of the International Association of Applied Mathematics and Mechanics, Braunschweig, Germany (2016)
Talk
Block-Diagonal Preconditioning for Optimal Control Problems Constrained by PDEs with Uncertain Inputs. SIAM Conference on Uncertainty Quantification, Lausanne, Switzerland (2016)
Talk
Efficient solvers for optimal control problems constrained by PDEs with uncertain inputs. 20th Conference of the International Linear Algebra Society (ILAS), Leuven, Belgium (2016)
Talk
Efficient solvers for optimal control problems constrained by PDEs with uncertain inputs. Workshop on Direct and Inverse Problems for PDEs with Random Coefficients, Berlin, Germany (2016)
2015
Talk
All-at-once Approach to Optimal Control Problems Constrained by PDEs with Uncertain Inputs. SIAM Conference on Computational Science and Engineering, Salt Lake City, Utah, United States (2015)
2014
Talk
Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. SIAM Conference on Uncertainty Quantification, Savannah, Georgia, USA (2014)
Talk
Low-Rank Solution of Unsteady Diffusion Equations with Stochastic Coefficients. 85th GAMM Annual Scientific Conference, Erlangen, Germany (2014)
Thesis - PhD (1)
2016
Thesis - PhD
Low-Rank Iterative Solvers for Large-Scale Stochastic Galerkin Linear Systems. Dissertation, Otto-von-Guericke Universität, Magdeburg (2016)
Preprint (2)
2018
Preprint
On the Existence and Uniqueness of the Solution of a Parabolic Optimal Control Problem with Uncertain Inputs. (2018)
2017
Preprint
Solving Optimal Control Problems governed by Random Navier-Stokes Equations using Low-Rank Methods. (2017)