156 citations · 454 across the 18 of their papers we have counts for
19 papers
A N-Body Solver for Free Mesh Interpolation
Matt Challacombe
Factorization of the Gaussian RBF kernel is developed for free-mesh interpolation in the flat, polynomial limit corresponding to Taylor expansion and the Vandermonde basis of geome…
A -Body Solver for Square Root Iteration
Matt Challacombe, Terry Haut, Nicolas Bock
We develop the Sparse Approximate Matrix Multiply () -body solver for first order Newton Schulz iteration of the matrix square root and inverse square root. The solve…
Solvers for Electronic Structure in the Strong Scaling Limit
Nicolas Bock, Matt Challacombe, Laxmikant V. Kalé
We present a hybrid OpenMP/Charm++ framework for solving the Self-Consistent-Field eigenvalue problem with parallelism in the strong scaling regime, , wh…
An N-Body Solution to the Problem of Fock Exchange
Matt Challacombe, Nicolas Bock
We report an N-Body approach to computing the Fock exchange matrix with and without permutational symmetry. The method achieves an O(N lg N) computational complexity through an emb…
An Optimized Sparse Approximate Matrix Multiply for Matrices with Decay
Nicolas Bock, Matt Challacombe
We present an optimized single-precision implementation of the Sparse Approximate Matrix Multiply (\SpAMM{}) [M. Challacombe and N. Bock, arXiv {\bf 1011.3534} (2010)], a fast algo…
Fast Multiplication of Matrices with Decay
Matt Challacombe, Nicolas Bock
A fast algorithm for the approximate multiplication of matrices with decay is introduced; the Sparse Approximate Matrix Multiply (SpAMM) reduces complexity in the product space, a…