Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

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

claein.f(3)				      LAPACK				      claein.f(3)

NAME
       claein.f -

SYNOPSIS
   Functions/Subroutines
       subroutine claein (RIGHTV, NOINIT, N, H, LDH, W, V, B, LDB, RWORK, EPS3, SMLNUM, INFO)
	   CLAEIN computes a specified right or left eigenvector of an upper Hessenberg matrix by
	   inverse iteration.

Function/Subroutine Documentation
   subroutine claein (logicalRIGHTV, logicalNOINIT, integerN, complex, dimension( ldh, * )H,
       integerLDH, complexW, complex, dimension( * )V, complex, dimension( ldb, * )B, integerLDB,
       real, dimension( * )RWORK, realEPS3, realSMLNUM, integerINFO)
       CLAEIN computes a specified right or left eigenvector of an upper Hessenberg matrix by
       inverse iteration.

       Purpose:

	    CLAEIN uses inverse iteration to find a right or left eigenvector
	    corresponding to the eigenvalue W of a complex upper Hessenberg
	    matrix H.

       Parameters:
	   RIGHTV

		     RIGHTV is LOGICAL
		     = .TRUE. : compute right eigenvector;
		     = .FALSE.: compute left eigenvector.

	   NOINIT

		     NOINIT is LOGICAL
		     = .TRUE. : no initial vector supplied in V
		     = .FALSE.: initial vector supplied in V.

	   N

		     N is INTEGER
		     The order of the matrix H.  N >= 0.

	   H

		     H is COMPLEX array, dimension (LDH,N)
		     The upper Hessenberg matrix H.

	   LDH

		     LDH is INTEGER
		     The leading dimension of the array H.  LDH >= max(1,N).

	   W

		     W is COMPLEX
		     The eigenvalue of H whose corresponding right or left
		     eigenvector is to be computed.

	   V

		     V is COMPLEX array, dimension (N)
		     On entry, if NOINIT = .FALSE., V must contain a starting
		     vector for inverse iteration; otherwise V need not be set.
		     On exit, V contains the computed eigenvector, normalized so
		     that the component of largest magnitude has magnitude 1; here
		     the magnitude of a complex number (x,y) is taken to be
		     |x| + |y|.

	   B

		     B is COMPLEX array, dimension (LDB,N)

	   LDB

		     LDB is INTEGER
		     The leading dimension of the array B.  LDB >= max(1,N).

	   RWORK

		     RWORK is REAL array, dimension (N)

	   EPS3

		     EPS3 is REAL
		     A small machine-dependent value which is used to perturb
		     close eigenvalues, and to replace zero pivots.

	   SMLNUM

		     SMLNUM is REAL
		     A machine-dependent value close to the underflow threshold.

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit
		     = 1:  inverse iteration did not converge; V is set to the
			   last iterate.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 149 of file claein.f.

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

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


All times are GMT -4. The time now is 05:45 AM.

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