clanhp man page on IRIX

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CLANHP(3F)							    CLANHP(3F)

NAME
     CLANHP - 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, supplied in packed form

SYNOPSIS
     REAL FUNCTION CLANHP( NORM, UPLO, N, AP, WORK )

	 CHARACTER NORM, UPLO

	 INTEGER   N

	 REAL	   WORK( * )

	 COMPLEX   AP( * )

PURPOSE
     CLANHP  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,  supplied in packed form.

DESCRIPTION
     CLANHP returns the value

	CLANHP = ( 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 CLANHP as described above.

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

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

									Page 1

CLANHP(3F)							    CLANHP(3F)

     AP	     (input) COMPLEX array, dimension (N*(N+1)/2)
	     The upper or lower triangle of the hermitian matrix A, packed
	     columnwise in a linear array.  The j-th column of A is stored in
	     the array AP as follows:  if UPLO = 'U', AP(i + (j-1)*j/2) =
	     A(i,j) for 1<=i<=j; if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) =
	     A(i,j) for j<=i<=n.  Note that the	 imaginary parts of the
	     diagonal elements need not be set and are assumed to be zero.

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

									Page 2

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