sknano.structures.compute_M¶

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

Compute $M = mp - nq$

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

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:	int $M = mp - nq$

*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:

int

$M = mp - nq$