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CentOS 7.0 - man page for dlansy.f (centos section 3)

dlansy.f(3)				      LAPACK				      dlansy.f(3)

NAME
       dlansy.f -

SYNOPSIS
   Functions/Subroutines
       DOUBLE PRECISION function dlansy (NORM, UPLO, N, A, LDA, WORK)
	   DLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm,
	   or the element of largest absolute value of a real symmetric matrix.

Function/Subroutine Documentation
   DOUBLE PRECISION function dlansy (characterNORM, characterUPLO, integerN, double precision,
       dimension( lda, * )A, integerLDA, double precision, dimension( * )WORK)
       DLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or
       the element of largest absolute value of a real symmetric matrix.

       Purpose:

	    DLANSY  returns the value of the one norm,	or the Frobenius norm, or
	    the  infinity norm,  or the  element of  largest absolute value  of a
	    real symmetric matrix A.

       Returns:
	   DLANSY

	       DLANSY = ( 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 DLANSY as described
		     above.

	   UPLO

		     UPLO is 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

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

	   A

		     A is DOUBLE PRECISION 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

		     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' or '1' or 'O'; otherwise,
		     WORK is not referenced.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 123 of file dlansy.f.

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

Version 3.4.2				 Tue Sep 25 2012			      dlansy.f(3)


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