Author

Deanna Needell

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Preprint Sep 2026

A Geometric View of Adaptive Cross Approximation via Exterior Algebra

Adaptive cross approximation (ACA) constructs low-rank CUR approximations from selected rows and columns of a matrix, making it attractive when individual entries are inexpensive to query but forming or repeatedly multiplying by the full matrix is not. Its practical performance, however, is not well explained by existi...

Trevor Loe, Long-Xiu Huang, Deanna Needell · 0 citations