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TableĀ 3 The computed lower bounds Tlb in seconds

From: A MapReduce-based Adjoint method for preventing brain disease

HDFS size (GB) Cholesky (s) Indirect TSQR (s) Direct TSQR (s) Householder QR (s) MR-AM (s)
32 802 802 1232 8224 625
64 536 536 618 10,055 467
128 366 366 10,475 30,994 450