sknano.structures.compute_psi

sknano.structures.compute_psi(*Ch)

Compute rotation component of symmetry operation \(\psi\) in radians.

\[\psi = \frac{2\pi}{N}\]

Parameters:

*Ch : {tuple or ints}

Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector \(\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)\).

Returns:

float

Rotation component of symmetry operation \(\psi\) in radians.