TESTING/MATGEN/dlagsy.f(3)                            Library Functions Manual

NAME
       TESTING/MATGEN/dlagsy.f

SYNOPSIS
   Functions/Subroutines
       subroutine dlagsy (n, k, d, a, lda, iseed, work, info)
           DLAGSY

Function/Subroutine Documentation
   subroutine dlagsy (integer n, integer k, double precision, dimension( * )
       d, double precision, dimension( lda, * ) a, integer lda, integer,
       dimension( 4 ) iseed, double precision, dimension( * ) work, integer
       info)
       DLAGSY

       Purpose:


            DLAGSY generates a real symmetric matrix A, by pre- and post-
            multiplying a real diagonal matrix D with a random orthogonal matrix:
            A = U*D*U'. The semi-bandwidth may then be reduced to k by additional
            orthogonal transformations.

       Parameters
           N

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

           K

                     K is INTEGER
                     The number of nonzero subdiagonals within the band of A.
                     0 <= K <= N-1.

           D

                     D is DOUBLE PRECISION array, dimension (N)
                     The diagonal elements of the diagonal matrix D.

           A

                     A is DOUBLE PRECISION array, dimension (LDA,N)
                     The generated n by n symmetric matrix A (the full matrix is
                     stored).

           LDA

                     LDA is INTEGER
                     The leading dimension of the array A.  LDA >= N.

           ISEED

                     ISEED is INTEGER array, dimension (4)
                     On entry, the seed of the random number generator; the array
                     elements must be between 0 and 4095, and ISEED(4) must be
                     odd.
                     On exit, the seed is updated.

           WORK

                     WORK is DOUBLE PRECISION array, dimension (2*N)

           INFO

                     INFO is INTEGER
                     = 0: successful exit
                     < 0: if INFO = -i, the i-th argument had an illegal value

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 100 of file dlagsy.f.

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

LAPACK                          Version 3.12.0      TESTING/MATGEN/dlagsy.f(3)