CLANSY man page on IRIX

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CLANSY(3F)							    CLANSY(3F)

NAME
     CLANSY - 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
     symmetric matrix A

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

	 CHARACTER NORM, UPLO

	 INTEGER   LDA, N

	 REAL	   WORK( * )

	 COMPLEX   A( LDA, * )

PURPOSE
     CLANSY  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
     symmetric matrix A.

DESCRIPTION
     CLANSY returns the value

	CLANSY = ( 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 CLANSY as described above.

     UPLO    (input) CHARACTER*1
	     Specifies whether the upper or lower triangular part of the
	     symmetric 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, CLANSY is set to
	     zero.

									Page 1

CLANSY(3F)							    CLANSY(3F)

     A	     (input) COMPLEX array, dimension (LDA,N)
	     The symmetric 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.

     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.

									Page 2

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