Abstract
We present an analysis of ensemble Kalman inversion, based on the continuous time limit of the algorithm. The analysis of the dynamical behaviour of the ensemble allows us to establish well-posedness and convergence results for a fixed ensemble size. We will build on recent results on the convergence in the noise-free case and generalise them to the case of noisy observational data, in particular the influence of the noise on the convergence will be investigated, both theoretically and numerically. We focus on linear inverse problems where a very complete theoretical analysis is possible.
Acknowledgements
Both authors are grateful to the careful reading, and suggestions, of two referees. AMS is also thanks DARPA and ONR for funding parts of this research.
Notes
No potential conflict of interest was reported by the authors.