dlansb.f man page on Cygwin

Man page or keyword search:  
man Server   22533 pages
apropos Keyword Search (all sections)
Output format
Cygwin logo
[printable version]

dlansb.f(3)			    LAPACK			   dlansb.f(3)

NAME
       dlansb.f -

SYNOPSIS
   Functions/Subroutines
       DOUBLE PRECISION function dlansb (NORM, UPLO, N, K, AB, LDAB, WORK)
	   DLANSB returns the value of the 1-norm, or the Frobenius norm, or
	   the infinity norm, or the element of largest absolute value of a
	   symmetric band matrix.

Function/Subroutine Documentation
   DOUBLE PRECISION function dlansb (characterNORM, characterUPLO, integerN,
       integerK, double precision, dimension( ldab, * )AB, integerLDAB, double
       precision, dimension( * )WORK)
       DLANSB returns the value of the 1-norm, or the Frobenius norm, or the
       infinity norm, or the element of largest absolute value of a symmetric
       band matrix.

       Purpose:

	    DLANSB  returns the value of the one norm,	or the Frobenius norm, or
	    the	 infinity norm,	 or the element of  largest absolute value  of an
	    n by n symmetric band matrix A,  with k super-diagonals.

       Returns:
	   DLANSB

	       DLANSB = ( 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 DLANSB as described
		     above.

	   UPLO

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

	   N

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

	   K

		     K is INTEGER
		     The number of super-diagonals or sub-diagonals of the
		     band matrix A.  K >= 0.

	   AB

		     AB is DOUBLE PRECISION array, dimension (LDAB,N)
		     The upper or lower triangle of the symmetric band matrix A,
		     stored in the first K+1 rows of AB.  The j-th column of A is
		     stored in the j-th column of the array AB as follows:
		     if UPLO = 'U', AB(k+1+i-j,j) = A(i,j) for max(1,j-k)<=i<=j;
		     if UPLO = 'L', AB(1+i-j,j)	  = A(i,j) for j<=i<=min(n,j+k).

	   LDAB

		     LDAB is INTEGER
		     The leading dimension of the array AB.  LDAB >= K+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 129 of file dlansb.f.

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

Version 3.4.2			Sat Nov 16 2013			   dlansb.f(3)
[top]

List of man pages available for Cygwin

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net