stdlib_zgbmv Subroutine

public pure subroutine stdlib_zgbmv(trans, m, n, kl, ku, alpha, a, lda, x, incx, beta, y, incy)

ZGBMV performs one of the matrix-vector operations y := alphaAx + betay, or y := alphaATx + betay, or y := alpha*AHx + betay, where alpha and beta are scalars, x and y are vectors and A is an m by n band matrix, with kl sub-diagonals and ku super-diagonals.

Arguments

Type IntentOptional Attributes Name
character(len=1), intent(in) :: trans
integer(kind=ilp), intent(in) :: m
integer(kind=ilp), intent(in) :: n
integer(kind=ilp), intent(in) :: kl
integer(kind=ilp), intent(in) :: ku
complex(kind=dp), intent(in) :: alpha
complex(kind=dp), intent(in) :: a(lda,*)
integer(kind=ilp), intent(in) :: lda
complex(kind=dp), intent(in) :: x(*)
integer(kind=ilp), intent(in) :: incx
complex(kind=dp), intent(in) :: beta
complex(kind=dp), intent(inout) :: y(*)
integer(kind=ilp), intent(in) :: incy