## Title data

Lubkoll, Lars ; Schiela, Anton ; Weiser, Martin:

**An affine covariant composite step method for optimization with PDEs as equality constraints.**

Konrad-Zuse-Zentrum für Informationstechnik Berlin

Berlin
,
2015
. - 40 p.
- (ZIB-Report
; 15-09
)

## Related URLs

## Project information

Project title: |
Project's official title Project's id DFG Research Center Matheon "Mathematics for key technologies" FZT 86 |
---|---|

Project financing: |
Deutsche Forschungsgemeinschaft |

## Abstract in another language

We propose a composite step method, designed for equality constrained optimization with partial differential equations. Focus is laid on the construction of a globalization scheme, which is based on cubic regularization of the objective and an affine covariant damped Newton method for feasibility. We show finite termination of the inner loop and fast local convergence of the algorithm. We discuss preconditioning strategies for the iterative solution of the arising linear systems with projected conjugate gradient. Numerical results are shown for optimal control problems subject to a nonlinear heat equation and subject to nonlinear elastic equations arising from an implant design problem in craniofacial surgery.