Amos S. Lawless

12 papers Journal 12
YearRankTypeTitle / Venue / Authors
2025 J jnl
An Introduction to Solving the Least-Squares Problem in Variational Data Assimilation.
CoRR
Ieva Dauzickaite, M. A. Freitag, Selime Gürol, Amos S. Lawless, A. Ramage, Jennifer A. Scott, Jemima M. Tabeart
2024 J jnl
Conditioning of hybrid variational data assimilation.
Numer. Linear Algebra Appl.
Shaerdan Shataer, Amos S. Lawless, Nancy K. Nichols
2023 J jnl
The Conditioning of Hybrid Variational Data Assimilation.
CoRR
Shaerdan Shataer, Amos S. Lawless, Nancy K. Nichols
2022 J jnl
New bounds on the condition number of the Hessian of the preconditioned variational data assimilation problem.
Numer. Linear Algebra Appl.
Jemima M. Tabeart, Sarah L. Dance, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2021 J jnl
Nonlinear Conditional Model Bias Estimation for Data Assimilation.
SIAM J. Appl. Dyn. Syst.
Jason A. Otkin, Roland W. E. Potthast, Amos S. Lawless
2021 J jnl
On preconditioning the state formulation of incremental weak constraint 4D-Var.
CoRR
Ieva Dauzickaite, Amos S. Lawless, Jennifer A. Scott, Peter Jan van Leeuwen
2021 J jnl
Randomised preconditioning for the forcing formulation of weak constraint 4D-Var.
CoRR
Ieva Dauzickaite, Amos S. Lawless, Jennifer A. Scott, Peter Jan van Leeuwen
2020 J jnl
Spectral estimates for saddle point matrices arising in weak constraint four-dimensional variational data assimilation.
Numer. Linear Algebra Appl.
Ieva Dauzickaite, Amos S. Lawless, Jennifer A. Scott, Peter Jan van Leeuwen
2020 J jnl
The conditioning of least squares problems in preconditioned variational data assimilation.
CoRR
Jemima M. Tabeart, Sarah L. Dance, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2019 J jnl
Spectral estimates for saddle point matrices arising in weak constraint four-dimensional variational data assimilation.
CoRR
Ieva Dauzickaite, Amos S. Lawless, Jennifer A. Scott, Peter Jan van Leeuwen
2018 J jnl
The conditioning of least-squares problems in variational data assimilation.
Numer. Linear Algebra Appl.
Jemima M. Tabeart, Sarah L. Dance, Stephen A. Haben, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2007 J jnl
Approximate Gauss-Newton Methods for Nonlinear Least Squares Problems.
SIAM J. Optim.
Serge Gratton, Amos S. Lawless, Nancy K. Nichols