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math.NA2013★ 15 cited
Existence of -matrix approximants to the inverses of BEM matrices: the simple-layer operator
Markus Faustmann, Jens Markus Melenk, Dirk Praetorius
We consider the question of approximating the inverse of the Galerkin stiffness matrix obtained by discretizing the simple-layer operator $…
math.NA2013★ 28 cited
H-matrix approximability of the inverses of FEM matrices
Markus Faustmann, Jens Markus Melenk, Dirk Praetorius
We study the question of approximability for the inverse of the FEM stiffness matrix for (scalar) second order elliptic boundary value problems by blockwise low rank matrices such…