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H2Lib

H2Lib is a software library for hierarchical matrices and H2-matrices developed mainly by the Scientific Computing Group of Kiel University.

The library offers

  • functions for setting up cluster trees and block trees,

  • functions for converting dense matrices and partially compressed matrices into hierarchical and H2-matrices,

  • functions for creating hierarchical matrices and H2-matrices for boundary element methods using various compression techniques like Chebyshev interpolation, ACA, HCA, and Green quadrature,

  • functions for creating hierarchical matrices and H2-matrices for finite element methods,

  • functions for performing arithmetic operations on hierarchical matrices like truncated matrix multiplication, inversion, and factorization.