New POD error expressions, error bounds, and asymptotic results for reduced order models of parabolic PDEs

JR Singler - SIAM Journal on Numerical Analysis, 2014 - SIAM
The derivations of existing error bounds for reduced order models of time varying partial
differential equations (PDEs) constructed using proper orthogonal decomposition (POD) …

On optimal pointwise in time error bounds and difference quotients for the proper orthogonal decomposition

B Koc, S Rubino, M Schneier, J Singler, T Iliescu - SIAM Journal on Numerical …, 2021 - SIAM
In this paper, we resolve several long-standing issues dealing with optimal pointwise in time
error bounds for proper orthogonal decomposition (POD) reduced order modeling of the …

Incremental proper orthogonal decomposition for PDE simulation data

H Fareed, JR Singler, Y Zhang, J Shen - Computers & Mathematics with …, 2018 - Elsevier
We propose an incremental algorithm to compute the proper orthogonal decomposition
(POD) of simulation data for a partial differential equation. Specifically, we modify an …

A quadrature framework for solving Lyapunov and Sylvester equations

C Bertram, H Faßbender - Linear Algebra and its Applications, 2021 - Elsevier
This paper introduces a novel framework for the solution of (large-scale) Lyapunov and
Sylvester equations derived from numerical integration methods. Suitable systems of …

New proper orthogonal decomposition approximation theory for PDE solution data

S Locke, J Singler - SIAM Journal on Numerical Analysis, 2020 - SIAM
In our previous work [JR Singler, SIAM J. Numer. Anal., 52 (2014), pp. 852--876], we
considered the proper orthogonal decomposition (POD) of time varying PDE solution data …

A new approach to proper orthogonal decomposition with difference quotients

SL Eskew, JR Singler - Advances in Computational Mathematics, 2023 - Springer
In a recent work (Koc et al., SIAM J. Numer. Anal. 59 (4), 2163–2196,), the authors showed
that including difference quotients (DQs) is necessary in order to prove optimal pointwise in …

Finite-rank ADI iteration for operator Lyapunov equations

MR Opmeer, T Reis, W Wollner - SIAM Journal on Control and Optimization, 2013 - SIAM
We give an algorithmic approach to the approximative solution of operator Lyapunov
equations for controllability. Motivated by the successfully applied alternating direction …

A note on incremental POD algorithms for continuous time data

H Fareed, JR Singler - Applied Numerical Mathematics, 2019 - Elsevier
In our earlier work Fareed et al.(2018)[18], we developed an incremental approach to
compute the proper orthogonal decomposition (POD) of PDE simulation data. Specifically …

Balanced POD for model reduction of linear PDE systems: convergence theory

JR Singler - Numerische Mathematik, 2012 - Springer
We consider convergence analysis for a model reduction algorithm for a class of linear
infinite dimensional systems. The algorithm computes an approximate balanced truncation …

A POD projection method for large-scale algebraic Riccati equations

B Kramer, JR Singler - Numerical Algebra, Control and …, 2016 - aimsciences.org
The solution of large-scale matrix algebraic Riccati equations is important for instance in
control design and model reduction and remains an active area of research. We consider a …