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

NAME
       TESTING/MATGEN/slagsy.f

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

Function/Subroutine Documentation
   subroutine slagsy (integer n, integer k, real, dimension( * ) d, real,
       dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed,
       real, dimension( * ) work, integer info)
       SLAGSY

       Purpose:


            SLAGSY 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 REAL array, dimension (N)
                     The diagonal elements of the diagonal matrix D.

           A

                     A is REAL 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 REAL 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 slagsy.f.

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

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