TESTING/LIN/clatsy.f(3)

NAME
TESTING/LIN/clatsy.f

SYNOPSIS

  Functions/Subroutines
subroutine clatsy (uplo, n, x, ldx, iseed)
CLATSY

Function/Subroutine Documentation

  subroutine clatsy (character uplo, integer n, complex, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) iseed)

CLATSY

Purpose:

    !>
    !> CLATSY generates a special test matrix for the complex symmetric
    !> (indefinite) factorization.  The pivot blocks of the generated matrix
    !> will be in the following order:
    !>    2x2 pivot block, non diagonalizable
    !>    1x1 pivot block
    !>    2x2 pivot block, diagonalizable
    !>    (cycle repeats)
    !> A row interchange is required for each non-diagonalizable 2x2 block.
    !>

Parameters
    UPLO

    !>          UPLO is CHARACTER
    !>          Specifies whether the generated matrix is to be upper or
    !>          lower triangular.
    !>          = 'U':  Upper triangular
    !>          = 'L':  Lower triangular
    !>

    N

    !>          N is INTEGER
    !>          The dimension of the matrix to be generated.
    !>

    X

    !>          X is COMPLEX array, dimension (LDX,N)
    !>          The generated matrix, consisting of 3x3 and 2x2 diagonal
    !>          blocks which result in the pivot sequence given above.
    !>          The matrix outside of these diagonal blocks is zero.
    !>

    LDX

    !>          LDX is INTEGER
    !>          The leading dimension of the array X.
    !>

    ISEED

    !>          ISEED is INTEGER array, dimension (4)
    !>          On entry, the seed for the random number generator.  The last
    !>          of the four integers must be odd.  (modified on exit)
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 88 of file clatsy.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.