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RedHat 9 (Linux i386) - man page for clanhe (redhat section l)

CLANHE(l)					)					CLANHE(l)

NAME
       CLANHE - return the value of the one norm, or the Frobenius norm, or the infinity norm, or
       the element of largest absolute value of a complex hermitian matrix A

SYNOPSIS
       REAL FUNCTION CLANHE( NORM, UPLO, N, A, LDA, WORK )

	   CHARACTER NORM, UPLO

	   INTEGER   LDA, N

	   REAL      WORK( * )

	   COMPLEX   A( LDA, * )

PURPOSE
       CLANHE returns the value of the one norm, or the Frobenius norm, or the infinity norm,  or
       the element of largest absolute value of a complex hermitian matrix A.

DESCRIPTION
       CLANHE returns the value

	  CLANHE = ( 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  matrix
       norm.

ARGUMENTS
       NORM    (input) CHARACTER*1
	       Specifies the value to be returned in CLANHE as described above.

       UPLO    (input) CHARACTER*1
	       Specifies whether the upper or lower triangular part of the hermitian matrix A  is
	       to be referenced.  = 'U':  Upper triangular part of A is referenced
	       = 'L':  Lower triangular part of A is referenced

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.  When N = 0, CLANHE is set to zero.

       A       (input) COMPLEX array, dimension (LDA,N)
	       The  hermitian  matrix A.  If UPLO = 'U', the leading n by n upper triangular part
	       of A contains the upper triangular part of the matrix A, and  the  strictly  lower
	       triangular  part  of A is not referenced.  If UPLO = 'L', the leading n by n lower
	       triangular part of A contains the lower triangular part of the matrix A,  and  the
	       strictly  upper	triangular  part  of A is not referenced. Note that the imaginary
	       parts of the diagonal elements need not be set and are assumed to be zero.

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

       WORK    (workspace) REAL array, dimension (LWORK),
	       where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise, WORK is not referenced.

LAPACK version 3.0			   15 June 2000 				CLANHE(l)


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