Function dmat_euler 

pub fn dmat_euler(
    euler_angles: (f64, f64, f64),
    increasingm: bool,
) -> Array2<Complex<f64>>

Returns the Wigner rotation matrix for $j = 1/2$ whose elements are defined by

\hat{R}(\alpha, \beta, \gamma) \ket{\tfrac{1}{2}m}
= \sum_{m'} \ket{\tfrac{1}{2}m'} D^{(1/2)}_{m'm}(\alpha, \beta, \gamma).

Arguments

• euler_angles - A triplet of Euler angles $(\alpha, \beta, \gamma)$ in radians, following the Whitaker convention, i.e. $z_2-y-z_1$ (extrinsic rotations).
• increasingm - If true, the rows and columns of $\mathbf{D}^{(1/2)}$ are arranged in increasing order of $m_l = -l, \ldots, l$. If false, the order is reversed: $m_l = l, \ldots, -l$. The recommended default is false, in accordance with convention.

Returns

The matrix $\mathbf{D}^{(1/2)}(\alpha, \beta, \gamma)$.