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math.NA2018
On the growth factor upper bound for Aasen's algorithm
Yuehua Feng, Linzhang Lu
Aasen's algorithm factorizes a symmetric indefinite matrix as , where is a permutation matrix, is unit lower triangular with its first column being the f…
math.NA2018
Low-Rank Matrix Approximations with Flip-Flop Spectrum-Revealing QR Factorization
Yuehua Feng, Jianwei Xiao, Ming Gu
We present Flip-Flop Spectrum-Revealing QR (Flip-Flop SRQR) factorization, a significantly faster and more reliable variant of the QLP factorization of Stewart, for low-rank matrix…