Improvements to the theoretical estimates of the Schwarz preconditioner with Δ-GenEO coarse space for the indefinite Helmholtz problem. - Victorita Dolean; Mark Fry; Ivan G. Graham; Matthias Langer (CoRR, 2024)

Schwarz preconditioner with Hk-GenEO coarse space for the indefinite Helmholtz problem. - Victorita Dolean; Mark Fry; Ivan G. Graham; Matthias Langer (CoRR, 2024)