26 citations · 57 across the 14 of their papers we have counts for
14 papers
Efficient local classification of parity-based material topology
Stephan Wong, Ichitaro Yamazaki, Chris Siefert +3
Although the classification of crystalline materials can be generally handled by momentum-space-based approaches, topological classification of aperiodic materials remains an outst…
A High Performance GPU CountSketch Implementation and Its Application to Multisketching and Least Squares Problems
Andrew J. Higgins, Erik G. Boman, Ichitaro Yamazaki
Random sketching is a dimensionality reduction technique that approximately preserves norms and singular values up to some distortion factor with high probability. The most…
Random-sketching Techniques to Enhance the Numerical Stability of Block Orthogonalization Algorithms for s-step GMRES
Ichitaro Yamazaki, Andrew J. Higgins, Erik G. Boman +1
We integrate random sketching techniques into block orthogonalization schemes needed for s-step GMRES. The resulting block orthogonalization schemes generate the basis vectors whos…
Two-Stage Block Orthogonalization to Improve Performance of -step GMRES
Ichitaro Yamazaki, Andrew J. Higgins, Erik G. Boman +1
On current computer architectures, GMRES' performance can be limited by its communication cost to generate orthonormal basis vectors of the Krylov subspace. To address this perform…
Analysis of Randomized Householder-Cholesky QR Factorization with Multisketching
Andrew J. Higgins, Daniel B. Szyld, Erik G. Boman +1
CholeskyQR2 and shifted CholeskyQR3 are two state-of-the-art algorithms for computing tall-and-skinny QR factorizations since they attain high performance on current computer archi…
An Experimental Study of Two-Level Schwarz Domain Decomposition Preconditioners on GPUs
Ichitaro Yamazaki, Alexander Heinlein, Sivasankaran Rajamanickam
The generalized Dryja--Smith--Widlund (GDSW) preconditioner is a two-level overlapping Schwarz domain decomposition (DD) preconditioner that couples a classical one-level overlappi…