HssMatrices.jl: A Julia package for hierarchically semi-separable matrices. HssMatrices is a Julia package for hierarchically semiseparable (HSS) matrices. These matrices are a type of hierarchically structured matrices, that arise in the context of solving PDEs numerically, among others. HssMatrices.jl is intendend to help users experiment with HSS matrices and related algorithms. HssMatrices.jl implements compression routines, HSS arithmetic, as well as helpful routines for clustering and visualization. These matrices have structures similar to the one in the illustration below.

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  1. Bonev, Boris; Hesthaven, Jan S.: A hierarchical preconditioner for wave problems in quasilinear complexity (2022)