Jeffrey Galkowski

According to our database, Jeffrey Galkowski authored at least 22 papers between 2019 and 2026.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

2026

Convergence Theory for Two-Level Hybrid Schwarz Preconditioners for High-Frequency Helmholtz Problems.

Jeffrey Galkowski, Euan A. Spence

SIAM J. Numer. Anal., 2026

2025

Numerical analysis of the high-frequency Helmholtz equation using semiclassical analysis.

Jeffrey Galkowski, Euan A. Spence

CoRR, November, 2025

Helmholtz boundary integral methods and the pollution effect.

Jeffrey Galkowski, Manas Rachh, Euan A. Spence

CoRR, July, 2025

Non-uniform finite-element meshes defined by ray dynamics for Helmholtz problems.

Martin Averseng, Jeffrey Galkowski, Euan A. Spence

CoRR, June, 2025

Sharp Preasymptotic Error Bounds for the Helmholtz \(\boldsymbol{h}\)-FEM.

Jeffrey Galkowski, Euan A. Spence

SIAM J. Numer. Anal., 2025

Lower bounds for piecewise polynomial approximations of oscillatory functions.

Jeffrey Galkowski

J. Approx. Theory, 2025

2024

Helmholtz FEM solutions are locally quasi-optimal modulo low frequencies.

Martin Averseng, Jeffrey Galkowski, Euan A. Spence

Adv. Comput. Math., December, 2024

The Scattering Phase: Seen at Last.

Jeffrey Galkowski, Pierre Marchand, Jian Wang, Maciej Zworski

SIAM J. Appl. Math., February, 2024

Schwarz methods with PMLs for Helmholtz problems: fast convergence at high frequency.

Jeffrey Galkowski, Shihua Gong, Ivan G. Graham, David Lafontaine, Euan A. Spence

CoRR, 2024

Sharp error bounds for edge-element discretisations of the high-frequency Maxwell equations.

Théophile Chaumont-Frelet, Jeffrey Galkowski, Euan A. Spence

CoRR, 2024

Convergence of overlapping domain decomposition methods with PML transmission conditions applied to nontrapping Helmholtz problems.

Jeffrey Galkowski, Shihua Gong, Ivan G. Graham, David Lafontaine, Euan A. Spence

CoRR, 2024

2023

Does the Helmholtz Boundary Element Method Suffer from the Pollution Effect?

Jeffrey Galkowski, Euan A. Spence

SIAM Rev., August, 2023

Decompositions of High-Frequency Helmholtz Solutions via Functional Calculus, and Application to the Finite Element Method.

Jeffrey Galkowski, David Lafontaine, Euan A. Spence, Jared Wunsch

SIAM J. Math. Anal., August, 2023

Perfectly-Matched-Layer Truncation is Exponentially Accurate at High Frequency.

Jeffrey Galkowski, David Lafontaine, Euan A. Spence

SIAM J. Math. Anal., August, 2023

Sharp preasymptotic error bounds for the Helmholtz h-FEM.

Jeffrey Galkowski, Euan A. Spence

CoRR, 2023

2022

The hp-FEM applied to the Helmholtz equation with PML truncation does not suffer from the pollution effect.

Jeffrey Galkowski, David Lafontaine, Euan A. Spence, Jared Wunsch

CoRR, 2022

The Helmholtz boundary element method does not suffer from the pollution effect.

Jeffrey Galkowski, Euan A. Spence

CoRR, 2022

Applying GMRES to the Helmholtz equation with strong trapping: how does the number of iterations depend on the frequency?

Pierre Marchand, Jeffrey Galkowski, Euan A. Spence, Alastair Spence

Adv. Comput. Math., 2022

2021

Eigenvalues of the Truncated Helmholtz Solution Operator under Strong Trapping.

Jeffrey Galkowski, Pierre Marchand, Euan A. Spence

SIAM J. Math. Anal., 2021

High-frequency estimates on boundary integral operators for the Helmholtz exterior Neumann problem.

Jeffrey Galkowski, Pierre Marchand, Euan A. Spence

CoRR, 2021

Local absorbing boundary conditions on fixed domains give order-one errors for high-frequency waves.

Jeffrey Galkowski, David Lafontaine, Euan A. Spence

CoRR, 2021

2019

Wavenumber-explicit analysis for the Helmholtz <i>h</i>-BEM: error estimates and iteration counts for the Dirichlet problem.

Jeffrey Galkowski, Eike Hermann Müller, Euan A. Spence

Numerische Mathematik, 2019