*> \brief \b ZGENND * * =========== DOCUMENTATION =========== * * Online html documentation available at * http://www.netlib.org/lapack/explore-html/ * * Definition: * =========== * * LOGICAL FUNCTION ZGENND (M, N, A, LDA) * * .. Scalar Arguments .. * INTEGER M, N, LDA * .. * .. Array Arguments .. * COMPLEX*16 A( LDA, * ) * .. * * *> \par Purpose: * ============= *> *> \verbatim *> *> ZGENND tests that its argument has a real, non-negative diagonal. *> \endverbatim * * Arguments: * ========== * *> \param[in] M *> \verbatim *> M is INTEGER *> The number of rows in A. *> \endverbatim *> *> \param[in] N *> \verbatim *> N is INTEGER *> The number of columns in A. *> \endverbatim *> *> \param[in] A *> \verbatim *> A is COMPLEX*16 array, dimension (LDA, N) *> The matrix. *> \endverbatim *> *> \param[in] LDA *> \verbatim *> LDA is INTEGER *> Leading dimension of A. *> \endverbatim * * Authors: * ======== * *> \author Univ. of Tennessee *> \author Univ. of California Berkeley *> \author Univ. of Colorado Denver *> \author NAG Ltd. * *> \ingroup complex16_lin * * ===================================================================== LOGICAL FUNCTION ZGENND (M, N, A, LDA) * * -- LAPACK test routine -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * * .. Scalar Arguments .. INTEGER M, N, LDA * .. * .. Array Arguments .. COMPLEX*16 A( LDA, * ) * .. * * ===================================================================== * * .. Parameters .. REAL ZERO PARAMETER ( ZERO = 0.0E0 ) * .. * .. Local Scalars .. INTEGER I, K COMPLEX*16 AII * .. * .. Intrinsics .. INTRINSIC MIN, DBLE, DIMAG * .. * .. Executable Statements .. K = MIN( M, N ) DO I = 1, K AII = A( I, I ) IF( DBLE( AII ).LT.ZERO.OR.DIMAG( AII ).NE.ZERO ) THEN ZGENND = .FALSE. RETURN END IF END DO ZGENND = .TRUE. RETURN END