Integral equations: theory and numerical treatment
Integral equations: theory and numerical treatment
Variable order panel clustering
Computing
A fast direct solver for boundary integral equations in two dimensions
Journal of Computational Physics
Journal of Computational and Applied Mathematics
Approximating Gaussian Processes with ${\cal H}^2$-Matrices
ECML '07 Proceedings of the 18th European conference on Machine Learning
Superfast Multifrontal Method for Large Structured Linear Systems of Equations
SIAM Journal on Matrix Analysis and Applications
Robust Approximate Cholesky Factorization of Rank-Structured Symmetric Positive Definite Matrices
SIAM Journal on Matrix Analysis and Applications
H-Matrix techniques for stray-field computations in computational micromagnetics
LSSC'05 Proceedings of the 5th international conference on Large-Scale Scientific Computing
A Fast Randomized Algorithm for Computing a Hierarchically Semiseparable Representation of a Matrix
SIAM Journal on Matrix Analysis and Applications
Journal of Scientific Computing
Journal of Computational Physics
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A class of matrices (H2-matrices) has recently been introduced for storing discretisations of elliptic problems and integral operators from the BEM. These matrices have the following properties: (i) They are sparse in the sense that only few data are needed for their representation. (ii) The matrix-vector multiplication is of linear complexity. (iii) In general, sums and products of these matrices are no longer in the same set, but after truncation to the H2-matrix format these operations are again of quasi-linear complexity.We introduce the basic ideas of H- and H2-matrices and present an algorithm that adaptively computes approximations of general matrices in the latter format.