cirq.linalg.is_special_unitary

Determines if a matrix is approximately unitary with unit determinant.

cirq.linalg.is_special_unitary(
    matrix: np.ndarray,
    *,
    rtol: float = 1e-05,
    atol: float = 1e-08
) -> bool

A matrix is special-unitary if it is square and its adjoint is its inverse and its determinant is one.

matrix The matrix to check.
rtol The per-matrix-entry relative tolerance on equality.
atol The per-matrix-entry absolute tolerance on equality.

Whether the matrix is unitary with unit determinant within the given tolerance.