compute_M

sknano.core.structures.compute_M(*Ch)

Compute $M = mp - nq$

$M$ is the number of multiples of the translation vector $\mathbf{T}$ in the vector $N\mathbf{R}$.

Parameters:*Ch –

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:$M = mp - nq$ Return type:int