A bottom-up sketching algorithm constructs H2 matrices in linear time and is implemented on GPUs with batched kernels, reporting up to 1000x speedup over the H2Opus top-down GPU construction.
Hierarchical interpolative factorization for self green’s function in 3d modified poisson-boltzmann equations,
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Adaptive Sketching Based Construction of H2 Matrices on GPUs
A bottom-up sketching algorithm constructs H2 matrices in linear time and is implemented on GPUs with batched kernels, reporting up to 1000x speedup over the H2Opus top-down GPU construction.