CCEQR is a deterministic variant of Golub-Businger CPQR that provably selects the same columns as GEQP3 while running faster on wide matrices with decaying column norms.
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Collect, Commit, Expand: Efficient CPQR-Based Column Selection for Extremely Wide Matrices
CCEQR is a deterministic variant of Golub-Businger CPQR that provably selects the same columns as GEQP3 while running faster on wide matrices with decaying column norms.