`scipy.linalg._fblas:ctpmv`

Signature

def ctpmv(n, ap, x, incx = 1, offx = 0, lower = 0, trans = 0, diag = 0, overwrite_x = 0)

Compute the triangular matrix-vector product x = op(a)@x for a packed triangular matrix (BLAS ctpmv).

n : int: Order of the matrix.
ap : ndarray: Triangular matrix in packed storage.
x : ndarray: Input/output vector.
incx : int, optional: Stride between successive elements of x. Default is 1.
offx : int, optional: Index of the first element of x to use. Default is 0.
lower : int, optional: If 0, the upper triangle is used; if 1, the lower. Default is 0.
trans : int, optional: Operation on the matrix: 0 none, 1 transpose, 2 conjugate transpose. Default is 0.
diag : int, optional: If 0, the matrix has a non-unit diagonal; if 1, it is unit-triangular. Default is 0.
overwrite_x : int, optional: If nonzero, x may be overwritten in place. Default is 0.