_dgbmv _dgemv _dger _dsbmv _dspmv _dspr _dspr2 _dsymv _dsyr _dsyr2 _dtbmv _dtbsv _dtpmv _dtpsv _dtrmv _dtrsv

_dgemv() void _dgemv ( char  trans, int  m, int  n, double  alpha, int  lda, double  a[], double  x[], int  incx, double  beta, double  y[], int  incy  ) y <- αAx + βy or y <- αATx + βy (BLAS 2) Purpose This routine performs one of the matrix-vector operations y <- alpha*A*x + beta*y or y <- alpha*A^T*x + beta*y where alpha and beta are scalars, x and y are vectors and A is an m x n matrix. Parameters [in] trans Specifies the operation to be performed. = 'N': y <- alpha*A*x + beta*y. = 'T' or 'C': y <- alpha*A^T*x + beta*y. [in] m Number of rows of the matrix A. (m >= 0) (If m = 0, returns without computation) [in] n Number of columns of the matrix A. (n >= 0) (If n = 0, returns without computation) [in] alpha Scalar alpha [in] lda Leading dimension of the two dimensional array a[][]. (lda >= max(1, m)) [in] a[][] Array a[la][lda] (la >= n) m x n matrix A. [in] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx) if trans = 'N', lx >= 1 + (m - 1)*abs(incx) otherwise) Input vector x. [in] incx Storage spacing between elements of x. (incx != 0) [in] beta Scalar beta. When beta is supplied as zero then y[] need not be set on input. [in,out] y[] Array y[ly] (ly >= 1 + (m - 1)*abs(incy) if trans = 'N', ly >= 1 + (n - 1)*abs(incy) otherwise) [in] Input vector y. [out] Output vector. (= alpha*A*x + beta*y or alpha*A^T*x + beta*y) [in] incy Storage spacing between elements of y. (incy != 0) Reference BLAS