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LOGICAL FUNCTION DGENND (M, N, A, LDA)
IMPLICIT NONE
*
* -- LAPACK test routine (version 3.1) --
* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
* February 2008
*
* .. Scalar Arguments ..
INTEGER M, N, LDA
* ..
* .. Array Arguments ..
DOUBLE PRECISION A( LDA, * )
* ..
*
* Purpose
* =======
*
* DGENND tests that its argument has a non-negative diagonal.
*
* Arguments
* =========
*
* M (input) INTEGER
* The number of rows in A.
*
* N (input) INTEGER
* The number of columns in A.
*
* A (input) DOUBLE PRECISION array, dimension (LDA, N)
* The matrix.
*
* LDA (input) INTEGER
* Leading dimension of A.
*
* =====================================================================
*
* .. Parameters ..
DOUBLE PRECISION ZERO
PARAMETER ( ZERO = 0.0D0 )
* ..
* .. Local Scalars ..
INTEGER I, K
* ..
* .. Intrinsics ..
INTRINSIC MIN
* ..
* .. Executable Statements ..
K = MIN( M, N )
DO I = 1, K
IF( A( I, I ).LT.ZERO ) THEN
DGENND = .FALSE.
RETURN
END IF
END DO
DGENND = .TRUE.
RETURN
END
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