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Code covered by the BSD License  

Highlights from
Blendenpik

from Blendenpik by Haim Avron
A fast solver of dense rectangular dense linear equations . (least squares or underdetermined).

mex_dgeqrf(A) 
function [B, tau] = mex_dgeqrf(A)
% B = mex_dgeqrf(A)
%
% Interface to LAPACK's DGEQRF function.
% Upper part of B is the triangular factor.
%          
% 6-December 2009, Version 1.3
% Copyright (C) 2009, Haim Avron and Sivan Toledo.

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