r) bidiagonal matrix B using the implicit zero-shift QR algorithm. See <a href="http://www.netlib.org/lapack/lawnspdf/lawn03.pdf">http://www.netlib.org/lapack/lawnspdf/lawn03.pdf</a>.</li><li>DLARTG generates a plane rotation with real cosine and real sine.</li><li>ZDROT applies a plane rotation, where the cos and sin (c and s) are real and the vectors cx and cy are complex.</li><li>ZLASR applies a sequence of plane rotations to a general rectangular matrix. simplified version needed to compare with.</li></