Ieva Daužickaitė

I am working as a postdoctoral researcher under guidance of Selime Gürol at C.E.R.F.A.C.S in Toulouse, France since November 2024. My current research is focused on numerical linear algebra algorithms for data assimilation.

During January 2022-September 2024 I was a postdoctoral researcher at the Faculty of Mathematics and Physics, Charles University in the Czech Republic. I worked on analysing mixed precision linear algebra algorithms with Erin C. Carson.

I obtained my PhD in applied mathematics from the University of Reading, UK, where I was a member of the Centre for Doctoral Training in Mathematics of Planet Earth and the Data Assimilation Research Centre. During my time there I worked on linear algebra techniques for data assimilation for numerical weather prediction.

You can reach me at dauzickaite at cerfacs.fr

Publications

[preprint] Carson, E. C. and Daužickaitė, I. “Mixed precision sketching for least-squares problems and its application in GMRES-based iterative refinement”, arXiv preprint, 2024. https://arxiv.org/abs/2410.06319

Carson, E. C. and Daužickaitė, I. “A comparison of mixed precision iterative refinement approaches for least-squares problems”, SIAM Journal on Matrix Analysis and Applications, 46(2), 1117-1144, 2025. https://doi.org/10.1137/24M1664927

Carson, E. C. and Daužickaitė, I. "Single-pass Nyström approximation in mixed precision ", SIAM Journal on Matrix Analysis and Applications, 45(3), 1361-1391, 2024. https://doi.org/10.1137/22M154079X

Carson, E. C. and Daužickaitė, I. "The stability of split-preconditioned FGMRES in four precisions", Electronic Transactions on Numerical Analysis, 60, 40 - 58, 2024. https://doi.org/10.1553/etna_vol60s40

Daužickaitė, I., Lawless, A. S., Scott, J. A., and van Leeuwen, P. J. "On time-parallel preconditioning for the state formulation of incremental weak constraint 4D-Var", Quarterly Journal of the Royal Meteorological Society, 147(740), 3521 - 3529, 2021. https://doi.org/10.1002/qj.4151

Daužickaitė, I., Lawless, A. S., Scott, J. A., and van Leeuwen, P. J. "Randomised preconditioning for the forcing formulation of weak constraint 4D-Var", Quarterly Journal of the Royal Meteorological Society,147(740), 3719 - 3734, 2021. https://doi.org/10.1002/qj.4140

Daužickaitė, I., Lawless, A. S., Scott, J. A., and van Leeuwen, P. J. "Spectral estimates for saddle point matrices arising in weak constraint four-dimensional variational data assimilation", Numerical Linear Algebra with Applications, 27(5), e2313, 2020. https://doi.org/10.1002/nla.2313

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