| SSYMV/DSYMV/CHEMV/ZHEMV | ||
| CHARACTER*1 | uplo |
|
| INTEGER*4 | n, lda, incx, incy | |
| COMPLEX*16 | alpha, beta, a(lda, n), x(lenx), y(leny) | |
| CALL ZHEMV(uplo, n, alpha, a, lda, x, incx, beta, y, incy) | ||
| VECLIB8: |
|
|
| CHARACTER*1 | uplo |
|
| INTEGER*8 | n, lda, incx, incy | |
| REAL*4 | alpha, beta, a(lda, n), x(lenx), y(leny) | |
| CALL SSYMV(uplo, n, alpha, a, lda, x, incx, beta, y, incy) | ||
| CHARACTER*1 | uplo |
|
| INTEGER*8 | n, lda, incx, incy | |
| REAL*8 | alpha, beta, a(lda, n), x(lenx), y(leny) | |
| CALL DSYMV(uplo, n, alpha, a, lda, x, incx, beta, y, incy) | ||
| CHARACTER*1 | uplo |
|
| INTEGER*8 | n, lda, incx, incy | |
| COMPLEX*8 | alpha, beta, a(lda, n), x(lenx), y(leny) | |
| CALL CHEMV(uplo, n, alpha, a, lda, x, incx, beta, y, incy) | ||
| CHARACTER*1 | uplo |
|
| INTEGER*8 | n, lda, incx, incy | |
| COMPLEX*16 | alpha, beta, a(lda, n), x(lenx), y(leny) | |
| CALL ZHEMV(uplo, n, alpha, a, lda, x, incx, beta, y, incy) | ||
Input | uplo | Upper/lower triangular option for A: | |
|
| ’L’ or ’l’ | Reference only the lower triangle of A. |
|
| ’U’ or ’u’ | Reference only the upper triangle |
|
|
| of A. |
| n | Number of rows and columns in matrix A, n ≥ 0. If | |
|
| n = 0, the subprograms do not reference a, x, or y. | |
| alpha | The scalar α. If alpha = 0, the subprograms compute | |
|
| y ← βy without referencing a or x. | |
| a | Array whose upper or lower triangle, as specified by | |
|
| uplo, contains the upper or lower triangle of an | |
|
| real symmetric or complex Hermitian matrix A. The | |
|
| other triangle of a is not referenced. | |
| lda | The leading dimension of array a as declared in the | |
|
| calling program unit, with lda ≥ max(n,1). | |
| x | Array of length lenx = (n−1)⋅incx+1 containing the | |
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| |
Chapter 3 Basic Matrix Operations 271