Hermitian |
| |
Input | UPLO | Specifies whether a triangular matrix is upper or lower |
|
| triangular. Use either BLAS_UPPER or BLAS_LOWER. |
| N | Number of columns in matrix A, n > 0. If n ≤ 0 , the |
|
| subprograms do not reference A, X, or Y. |
| ALPHA | The scalar ALPHA. |
| A | COMPLEX array, dimension (LDA, N). |
| LDA | Leading dimension of array A. If lda < 1 or lda < n, an |
|
| error condition is generated. |
| X | COMPLEX array, minimum length (N - 1) x incx + 1. |
| INCX | Increment for the array x. A vector x having component |
|
| xi, i = 1,..., n, is stored in an array X() with increment |
|
| argument incx. If incx > 0 then xi is stored in |
|
| X (1 + (i - 1) x incx). If incx < 0 then xiis stored in |
|
| X (1 + (N - i) x incx). incx = 0 is an illegal value. |
| BETA | The scalar BETA. |
| Y | COMPLEX array, minimum length (N - 1) x incy + 1. |
| INCY | Increment for the array y. A vector y having component |
|
| yi, i = 1,..., n, is stored in an array Y() with increment |
|
| argument incy. If incy > 0 then yiis stored in |
|
| Y(1 + (i - 1) x incy). If incy < 0 then yi is stored in |
|
| Y(1 + (N - i) x incy). incy = 0 is an illegal value. |
Output | Y | The updated Y vector replaces the input. |
|
| y ← αAx + βy with A=A∗ |
Chapter 3 Basic Matrix Operations 343