Filtered Rayleigh-Ritz and the Prony-Ritz equivalence class
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Recent work [Phys. Rev. Lett. 134, 241901 (2025)0031-900710.1103/pcvc-734h; Phys. Rev. D 112, 054506 (2025)10.1103/zjzt-rv86; Phys. Rev. D 112, 014514 (2025)2470-001010.1103/fp74-q35q] has shown that the (block) Lanczos algorithm can be used to extract approxi... ...
