sknano.structures.compute_psi¶

sknano.structures.compute_psi(*Ch)[source][source]¶

Compute rotation component of symmetry operation $\psi$ in radians.

$\psi = \frac{2\pi}{N}$

Parameters:

Parameters:	*Ch : {`tuple` or `int`s} 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.

*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.