diff options
Diffstat (limited to 'SRC/claqr0.f')
| -rw-r--r-- | SRC/claqr0.f | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/SRC/claqr0.f b/SRC/claqr0.f index 4ea7417b..0d09d548 100644 --- a/SRC/claqr0.f +++ b/SRC/claqr0.f @@ -13,8 +13,8 @@ COMPLEX H( LDH, * ), W( * ), WORK( * ), Z( LDZ, * ) * .. * -* Purpose -* ======= +* Purpose +* ======= * * CLAQR0 computes the eigenvalues of a Hessenberg matrix H * and, optionally, the matrices T and Z from the Schur decomposition @@ -26,8 +26,8 @@ * of a matrix A which has been reduced to the Hessenberg form H * by the unitary matrix Q: A = Q*H*Q**H = (QZ)*H*(QZ)**H. * -* Arguments -* ========= +* Arguments +* ========= * * WANTT (input) LOGICAL * = .TRUE. : the full Schur form T is required; @@ -41,6 +41,7 @@ * The order of the matrix H. N .GE. 0. * * ILO (input) INTEGER +* * IHI (input) INTEGER * It is assumed that H is already upper triangular in rows * and columns 1:ILO-1 and IHI+1:N and, if ILO.GT.1, @@ -134,12 +135,13 @@ * If INFO .GT. 0 and WANTZ is .FALSE., then Z is not * accessed. * -* ================================================================ +* Further Details +* =============== +* * Based on contributions by * Karen Braman and Ralph Byers, Department of Mathematics, * University of Kansas, USA * -* ================================================================ * References: * K. Braman, R. Byers and R. Mathias, The Multi-Shift QR * Algorithm Part I: Maintaining Well Focused Shifts, and Level 3 @@ -150,7 +152,7 @@ * Algorithm Part II: Aggressive Early Deflation, SIAM Journal * of Matrix Analysis, volume 23, pages 948--973, 2002. * -* ================================================================ +* ================================================================ * .. Parameters .. * * ==== Matrices of order NTINY or smaller must be processed by |