`scipy.linalg._fblas:cher2`

Signature

def cher2(alpha, x, y, lower = 0, incx = 1, offx = 0, incy = 1, offy = 0, n = None, a = None, overwrite_a = 0)

Hermitian rank-2 update a = alpha*outer(x, conj(y)) + conj(alpha)*outer(y, conj(x)) + a (BLAS cher2).

alpha : complex: Scalar multiplier.
x : ndarray: First input vector.
y : ndarray: Second input vector.
lower : int, optional: If 0, the upper triangle is used; if 1, the lower. Default is 0.
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.
incy : int, optional: Stride between successive elements of y. Default is 1.
offy : int, optional: Index of the first element of y to use. Default is 0.
n : int, optional: Order of the matrix. Default is inferred from x.
a : ndarray, optional: Matrix to update; if omitted a new zero matrix is allocated. Default is None.
overwrite_a : int, optional: If nonzero, a may be overwritten in place. Default is 0.