Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

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

ZLANHT(l)					)					ZLANHT(l)

NAME
       ZLANHT - 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 tridiagonal matrix A

SYNOPSIS
       DOUBLE PRECISION FUNCTION ZLANHT( NORM, N, D, E )

	   CHARACTER	NORM

	   INTEGER	N

	   DOUBLE	PRECISION D( * )

	   COMPLEX*16	E( * )

PURPOSE
       ZLANHT 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 tridiagonal matrix A.

DESCRIPTION
       ZLANHT returns the value

	  ZLANHT = ( 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 ZLANHT as described above.

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

       D       (input) DOUBLE PRECISION array, dimension (N)
	       The diagonal elements of A.

       E       (input) COMPLEX*16 array, dimension (N-1)
	       The (n-1) sub-diagonal or super-diagonal elements of A.

LAPACK version 3.0			   15 June 2000 				ZLANHT(l)


All times are GMT -4. The time now is 06:21 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password