`scipy.linalg._fblas:dtrmv`

Signature

def dtrmv(a, x, offx = 0, incx = 1, lower = 0, trans = 0, diag = 0, overwrite_x = 0)

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

a : ndarray: Triangular matrix; only the triangle selected by lower is referenced.
x : ndarray: Input/output vector.
offx : int, optional: Index of the first element of x to use. Default is 0.
incx : int, optional: Stride between successive elements of x. Default is 1.
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.