3 papers
cs.DS2025
Value-Compressed Sparse Column (VCSC): Sparse Matrix Storage for Redundant Data
Skyler Ruiter, Seth Wolfgang, Marc Tunnell +3
Compressed Sparse Column (CSC) and Coordinate (COO) are popular compression formats for sparse matrices. However, both CSC and COO are general purpose and cannot take advantage of…
math.NA2025
An Empirical Study of Conjugate Gradient Preconditioners for Solving Symmetric Positive Definite Systems of Linear Equations
Marc A. Tunnell, David F. Gleich
Despite hundreds of papers on preconditioned linear systems of equations, there remains a significant lack of comprehensive performance benchmarks comparing various preconditioners…
cs.LG2024
Rank Suggestion in Non-negative Matrix Factorization: Residual Sensitivity to Initial Conditions (RSIC)
Marc A. Tunnell, Zachary J. DeBruine, Erin Carrier
Determining the appropriate rank in Non-negative Matrix Factorization (NMF) is a critical challenge that often requires extensive parameter tuning and domain-specific knowledge. Tr…