On Thursday, May 31, 2018 at 12:20:49 PM UTC-7, Simon King wrote: > > If I understand correctly, when using rescale_row in a schoolbook > implementation of gaussian elimination, it is certainly the case that > the leading columns are zero. But would it be ok to state this > assumption in the docs? > > I am not sure this is the case. For instance, numerical in-place LU decomposition algorithms tend to use the lower triangular half of the matrix to keep track of the transformations that lead to echelon form, so there may be good reasons to only transform the right part of a row without the leading entries actually being zero.
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