Abstract Motivated by the substantial instability of fundamental and high-overtone quasinormal modes (QNMs), recent developments regarding notion black hole pseudospectrum call for numerical results with unprecedented precision. This work generalizes improves matrix method QNMs to higher orders, specifically aiming at a class perturbations metric featured discontinuity intimately associated QNM...

Related DatabasesWeb of Science You must be logged in with an active subscription to view this.Article DataHistorySubmitted: 12 January 2021Accepted: 07 June 2021Published online: 28 September 2021Keywordsmultiple scattering, multipole expansion, layer potential, error analysis, truncation errorAMS Subject Headings31A10, 42B10, 65N12, 65N15, 65R20, 70F10, 78M15, 78M16Publication DataISSN (print...

Information retrieval (IR) aims to obtain relevant information according a certain user need and involves great diversity of data such as texts, images, or videos. Query expansion techniques, part (IR), are used more items, particularly documents, that the requirements. The initial query is reformulated, adding meaningful terms with similar significance. In this study, supervised technique base...