diff options
Diffstat (limited to 'TESTING/EIG/dsyt22.f')
| -rw-r--r-- | TESTING/EIG/dsyt22.f | 45 |
1 files changed, 15 insertions, 30 deletions
diff --git a/TESTING/EIG/dsyt22.f b/TESTING/EIG/dsyt22.f index 23ecdbf5..dc0e5ba4 100644 --- a/TESTING/EIG/dsyt22.f +++ b/TESTING/EIG/dsyt22.f @@ -53,100 +53,85 @@ *> Specifies the type of tests to be performed. *> 1: U expressed as a dense orthogonal matrix: *> RESULT(1) = | A - U S U' | / ( |A| n ulp ) *andC> RESULT(2) = | I - UU' | / ( n ulp ) -*> \endverbatim -*> \verbatim +*> *> UPLO CHARACTER *> If UPLO='U', the upper triangle of A will be used and the *> (strictly) lower triangle will not be referenced. If *> UPLO='L', the lower triangle of A will be used and the *> (strictly) upper triangle will not be referenced. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> N INTEGER *> The size of the matrix. If it is zero, DSYT22 does nothing. *> It must be at least zero. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> M INTEGER *> The number of columns of U. If it is zero, DSYT22 does *> nothing. It must be at least zero. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> KBAND INTEGER *> The bandwidth of the matrix. It may only be zero or one. *> If zero, then S is diagonal, and E is not referenced. If *> one, then S is symmetric tri-diagonal. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> A DOUBLE PRECISION array, dimension (LDA , N) *> The original (unfactored) matrix. It is assumed to be *> symmetric, and only the upper (UPLO='U') or only the lower *> (UPLO='L') will be referenced. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> LDA INTEGER *> The leading dimension of A. It must be at least 1 *> and at least N. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> D DOUBLE PRECISION array, dimension (N) *> The diagonal of the (symmetric tri-) diagonal matrix. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> E DOUBLE PRECISION array, dimension (N) *> The off-diagonal of the (symmetric tri-) diagonal matrix. *> E(1) is ignored, E(2) is the (1,2) and (2,1) element, etc. *> Not referenced if KBAND=0. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> U DOUBLE PRECISION array, dimension (LDU, N) *> If ITYPE=1 or 3, this contains the orthogonal matrix in *> the decomposition, expressed as a dense matrix. If ITYPE=2, *> then it is not referenced. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> LDU INTEGER *> The leading dimension of U. LDU must be at least N and *> at least 1. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> V DOUBLE PRECISION array, dimension (LDV, N) *> If ITYPE=2 or 3, the lower triangle of this array contains *> the Householder vectors used to describe the orthogonal *> matrix in the decomposition. If ITYPE=1, then it is not *> referenced. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> LDV INTEGER *> The leading dimension of V. LDV must be at least N and *> at least 1. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> TAU DOUBLE PRECISION array, dimension (N) *> If ITYPE >= 2, then TAU(j) is the scalar factor of *> v(j) v(j)' in the Householder transformation H(j) of *> the product U = H(1)...H(n-2) *> If ITYPE < 2, then TAU is not referenced. *> Not modified. -*> \endverbatim -*> \verbatim +*> *> WORK DOUBLE PRECISION array, dimension (2*N**2) *> Workspace. *> Modified. -*> \endverbatim -*> \verbatim +*> *> RESULT DOUBLE PRECISION array, dimension (2) *> The values computed by the two tests described above. The *> values are currently limited to 1/ulp, to avoid overflow. |