“…Without loss of generality, we neglect the pivoting matrices P i for deriving the level‐3 formulation of the algorithm. The integration of the pivoting is straightforward, as described in the works of Quintana‐Ortí et al and Köhler et al Note that the application of a Gauss‐Transform G i from the left to a matrix A can be reformulated into a rank‐1 update with the subsequent row scaling The partitioning of the matrix A into…”