centos man page for claed0

claed0.f(3)							      LAPACK							       claed0.f(3)

NAME
       claed0.f -

SYNOPSIS
   Functions/Subroutines
       subroutine claed0 (QSIZ, N, D, E, Q, LDQ, QSTORE, LDQS, RWORK, IWORK, INFO)
	   CLAED0 used by sstedc. Computes all eigenvalues and corresponding eigenvectors of an unreduced symmetric tridiagonal matrix using the
	   divide and conquer method.

Function/Subroutine Documentation
   subroutine claed0 (integerQSIZ, integerN, real, dimension( * )D, real, dimension( * )E, complex, dimension( ldq, * )Q, integerLDQ, complex,
       dimension( ldqs, * )QSTORE, integerLDQS, real, dimension( * )RWORK, integer, dimension( * )IWORK, integerINFO)
       CLAED0 used by sstedc. Computes all eigenvalues and corresponding eigenvectors of an unreduced symmetric tridiagonal matrix using the
       divide and conquer method.

       Purpose:

	    Using the divide and conquer method, CLAED0 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 REAL array, dimension (N)
		    On entry, the diagonal elements of the tridiagonal matrix.
		    On exit, the eigenvalues in ascending order.

	   E

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

	   Q

		     Q is COMPLEX 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 REAL 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 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:
	   September 2012

       Definition at line 145 of file claed0.f.

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

Version 3.4.2							  Tue Sep 25 2012						       claed0.f(3)