LAPACK 3.12.0
LAPACK: Linear Algebra PACKage
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dlahr2.f File Reference

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subroutine dlahr2 (n, k, nb, a, lda, tau, t, ldt, y, ldy)
 DLAHR2 reduces the specified number of first columns of a general rectangular matrix A so that elements below the specified subdiagonal are zero, and returns auxiliary matrices which are needed to apply the transformation to the unreduced part of A.