Block LU backward error is bounded quadratically in a new blockwise growth factor, and BEAM provably needs no modifications for diagonally dominant, H-matrix, and SPD inputs.
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The Stability of Block Eliminations and Additive Modifications
Block LU backward error is bounded quadratically in a new blockwise growth factor, and BEAM provably needs no modifications for diagonally dominant, H-matrix, and SPD inputs.