debian man page for zlaed0

zlaed0.f(3)							      LAPACK							       zlaed0.f(3)

NAME
       zlaed0.f -

SYNOPSIS
   Functions/Subroutines
       subroutine zlaed0 (QSIZ, N, D, E, Q, LDQ, QSTORE, LDQS, RWORK, IWORK, INFO)
	   ZLAED0

Function/Subroutine Documentation
   subroutine zlaed0 (integerQSIZ, integerN, double precision, dimension( * )D, double precision, dimension( * )E, complex*16, dimension( ldq, *
       )Q, integerLDQ, complex*16, dimension( ldqs, * )QSTORE, integerLDQS, double precision, dimension( * )RWORK, integer, dimension( * )IWORK,
       integerINFO)
       ZLAED0

       Purpose:

	    Using the divide and conquer method, ZLAED0 computes all eigenvalues
	    of a symmetric tridiagonal matrix which is one diagonal block of
	    those from reducing a dense or band Hermitian matrix and
	    corresponding eigenvectors of the dense or band matrix.

       Parameters:
	   QSIZ

		     QSIZ is INTEGER
		    The dimension of the unitary matrix used to reduce
		    the full matrix to tridiagonal form.  QSIZ >= N if ICOMPQ = 1.

	   N

		     N is INTEGER
		    The dimension of the symmetric tridiagonal matrix.	N >= 0.

	   D

		     D is DOUBLE PRECISION array, dimension (N)
		    On entry, the diagonal elements of the tridiagonal matrix.
		    On exit, the eigenvalues in ascending order.

	   E

		     E is DOUBLE PRECISION array, dimension (N-1)
		    On entry, the off-diagonal elements of the tridiagonal matrix.
		    On exit, E has been destroyed.

	   Q

		     Q is COMPLEX*16 array, dimension (LDQ,N)
		    On entry, Q must contain an QSIZ x N matrix whose columns
		    unitarily orthonormal. It is a part of the unitary matrix
		    that reduces the full dense Hermitian matrix to a
		    (reducible) symmetric tridiagonal matrix.

	   LDQ

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

	   IWORK

		     IWORK is INTEGER array,
		    the dimension of IWORK must be at least
				 6 + 6*N + 5*N*lg N
				 ( lg( N ) = smallest integer k
					     such that 2^k >= N )

	   RWORK

		     RWORK is DOUBLE PRECISION array,
					  dimension (1 + 3*N + 2*N*lg N + 3*N**2)
				   ( lg( N ) = smallest integer k
					       such that 2^k >= N )

	   QSTORE

		     QSTORE is COMPLEX*16 array, dimension (LDQS, N)
		    Used to store parts of
		    the eigenvector matrix when the updating matrix multiplies
		    take place.

	   LDQS

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

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit.
		     < 0:  if INFO = -i, the i-th argument had an illegal value.
		     > 0:  The algorithm failed to compute an eigenvalue while
			   working on the submatrix lying in rows and columns
			   INFO/(N+1) through mod(INFO,N+1).

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 145 of file zlaed0.f.

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

Version 3.4.1							  Sun May 26 2013						       zlaed0.f(3)