--- rpl/lapack/lapack/zlahr2.f 2010/12/21 13:53:49 1.7 +++ rpl/lapack/lapack/zlahr2.f 2011/07/22 07:38:17 1.8 @@ -1,6 +1,6 @@ SUBROUTINE ZLAHR2( N, K, NB, A, LDA, TAU, T, LDT, Y, LDY ) * -* -- LAPACK auxiliary routine (version 3.2.1) -- +* -- LAPACK auxiliary routine (version 3.3.1) -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * -- April 2009 -- @@ -19,8 +19,8 @@ * ZLAHR2 reduces the first NB columns of A complex general n-BY-(n-k+1) * matrix A so that elements below the k-th subdiagonal are zero. The * reduction is performed by an unitary similarity transformation -* Q' * A * Q. The routine returns the matrices V and T which determine -* Q as a block reflector I - V*T*V', and also the matrix Y = A * V * T. +* Q**H * A * Q. The routine returns the matrices V and T which determine +* Q as a block reflector I - V*T*V**H, and also the matrix Y = A * V * T. * * This is an auxiliary routine called by ZGEHRD. * @@ -75,7 +75,7 @@ * * Each H(i) has the form * -* H(i) = I - tau * v * v' +* H(i) = I - tau * v * v**H * * where tau is a complex scalar, and v is a complex vector with * v(1:i+k-1) = 0, v(i+k) = 1; v(i+k+1:n) is stored on exit in @@ -84,7 +84,7 @@ * The elements of the vectors v together form the (n-k+1)-by-nb matrix * V which is needed, with T and Y, to apply the transformation to the * unreduced part of the matrix, using an update of the form: -* A := (I - V*T*V') * (A - Y*V'). +* A := (I - V*T*V**H) * (A - Y*V**H). * * The contents of A on exit are illustrated by the following example * with n = 7, k = 3 and nb = 2: @@ -144,14 +144,14 @@ * * Update A(K+1:N,I) * -* Update I-th column of A - Y * V' +* Update I-th column of A - Y * V**H * CALL ZLACGV( I-1, A( K+I-1, 1 ), LDA ) CALL ZGEMV( 'NO TRANSPOSE', N-K, I-1, -ONE, Y(K+1,1), LDY, $ A( K+I-1, 1 ), LDA, ONE, A( K+1, I ), 1 ) CALL ZLACGV( I-1, A( K+I-1, 1 ), LDA ) * -* Apply I - V * T' * V' to this column (call it b) from the +* Apply I - V * T**H * V**H to this column (call it b) from the * left, using the last column of T as workspace * * Let V = ( V1 ) and b = ( b1 ) (first I-1 rows) @@ -159,20 +159,20 @@ * * where V1 is unit lower triangular * -* w := V1' * b1 +* w := V1**H * b1 * CALL ZCOPY( I-1, A( K+1, I ), 1, T( 1, NB ), 1 ) CALL ZTRMV( 'Lower', 'Conjugate transpose', 'UNIT', $ I-1, A( K+1, 1 ), $ LDA, T( 1, NB ), 1 ) * -* w := w + V2'*b2 +* w := w + V2**H * b2 * CALL ZGEMV( 'Conjugate transpose', N-K-I+1, I-1, $ ONE, A( K+I, 1 ), $ LDA, A( K+I, I ), 1, ONE, T( 1, NB ), 1 ) * -* w := T'*w +* w := T**H * w * CALL ZTRMV( 'Upper', 'Conjugate transpose', 'NON-UNIT', $ I-1, T, LDT,