--- rpl/lapack/lapack/zlansb.f	2012/08/22 09:48:36	1.10
+++ rpl/lapack/lapack/zlansb.f	2012/12/14 12:30:31	1.11
@@ -1,4 +1,4 @@
-*> \brief \b ZLANSB
+*> \brief \b ZLANSB returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric band matrix.
 *
 *  =========== DOCUMENTATION ===========
 *
@@ -122,7 +122,7 @@
 *> \author Univ. of Colorado Denver 
 *> \author NAG Ltd. 
 *
-*> \date November 2011
+*> \date September 2012
 *
 *> \ingroup complex16OTHERauxiliary
 *
@@ -130,10 +130,10 @@
       DOUBLE PRECISION FUNCTION ZLANSB( NORM, UPLO, N, K, AB, LDAB,
      $                 WORK )
 *
-*  -- LAPACK auxiliary routine (version 3.4.0) --
+*  -- LAPACK auxiliary routine (version 3.4.2) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2011
+*     September 2012
 *
 *     .. Scalar Arguments ..
       CHARACTER          NORM, UPLO
@@ -155,8 +155,8 @@
       DOUBLE PRECISION   ABSA, SCALE, SUM, VALUE
 *     ..
 *     .. External Functions ..
-      LOGICAL            LSAME
-      EXTERNAL           LSAME
+      LOGICAL            LSAME, DISNAN
+      EXTERNAL           LSAME, DISNAN
 *     ..
 *     .. External Subroutines ..
       EXTERNAL           ZLASSQ
@@ -176,13 +176,15 @@
          IF( LSAME( UPLO, 'U' ) ) THEN
             DO 20 J = 1, N
                DO 10 I = MAX( K+2-J, 1 ), K + 1
-                  VALUE = MAX( VALUE, ABS( AB( I, J ) ) )
+                  SUM = ABS( AB( I, J ) )
+                  IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM
    10          CONTINUE
    20       CONTINUE
          ELSE
             DO 40 J = 1, N
                DO 30 I = 1, MIN( N+1-J, K+1 )
-                  VALUE = MAX( VALUE, ABS( AB( I, J ) ) )
+                  SUM = ABS( AB( I, J ) )
+                  IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM
    30          CONTINUE
    40       CONTINUE
          END IF
@@ -204,7 +206,8 @@
                WORK( J ) = SUM + ABS( AB( K+1, J ) )
    60       CONTINUE
             DO 70 I = 1, N
-               VALUE = MAX( VALUE, WORK( I ) )
+               SUM = WORK( I )
+               IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM
    70       CONTINUE
          ELSE
             DO 80 I = 1, N
@@ -218,7 +221,7 @@
                   SUM = SUM + ABSA
                   WORK( I ) = WORK( I ) + ABSA
    90          CONTINUE
-               VALUE = MAX( VALUE, SUM )
+               IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM
   100       CONTINUE
          END IF
       ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN