SRC/zlanhs.f(3)            Library Functions Manual            SRC/zlanhs.f(3)

NAME
       SRC/zlanhs.f

SYNOPSIS
   Functions/Subroutines
       double precision function zlanhs (norm, n, a, lda, work)
           ZLANHS returns the value of the 1-norm, Frobenius norm,
           infinity-norm, or the largest absolute value of any element of an
           upper Hessenberg matrix.

Function/Subroutine Documentation
   double precision function zlanhs (character norm, integer n, complex*16,
       dimension( lda, * ) a, integer lda, double precision, dimension( * )
       work)
       ZLANHS returns the value of the 1-norm, Frobenius norm, infinity-norm,
       or the largest absolute value of any element of an upper Hessenberg
       matrix.

       Purpose:


           !>
           !> ZLANHS  returns the value of the one norm,  or the Frobenius norm, or
           !> the  infinity norm,  or the  element of  largest absolute value  of a
           !> Hessenberg matrix A.
           !>

       Returns
           ZLANHS

           !>
           !>    ZLANHS = ( max(abs(A(i,j))), NORM = 'M' or 'm'
           !>             (
           !>             ( norm1(A),         NORM = '1', 'O' or 'o'
           !>             (
           !>             ( normI(A),         NORM = 'I' or 'i'
           !>             (
           !>             ( normF(A),         NORM = 'F', 'f', 'E' or 'e'
           !>
           !> where  norm1  denotes the  one norm of a matrix (maximum column sum),
           !> normI  denotes the  infinity norm  of a matrix  (maximum row sum) and
           !> normF  denotes the  Frobenius norm of a matrix (square root of sum of
           !> squares).  Note that  max(abs(A(i,j)))  is not a consistent matrix norm.
           !>

       Parameters
           NORM

           !>          NORM is CHARACTER*1
           !>          Specifies the value to be returned in ZLANHS as described
           !>          above.
           !>

           N

           !>          N is INTEGER
           !>          The order of the matrix A.  N >= 0.  When N = 0, ZLANHS is
           !>          set to zero.
           !>

           A

           !>          A is COMPLEX*16 array, dimension (LDA,N)
           !>          The n by n upper Hessenberg matrix A; the part of A below the
           !>          first sub-diagonal is not referenced.
           !>

           LDA

           !>          LDA is INTEGER
           !>          The leading dimension of the array A.  LDA >= max(N,1).
           !>

           WORK

           !>          WORK is DOUBLE PRECISION array, dimension (MAX(1,LWORK)),
           !>          where LWORK >= N when NORM = 'I'; otherwise, WORK is not
           !>          referenced.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 108 of file zlanhs.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0                 SRC/zlanhs.f(3)