- #1

frankzappa

- 4

- 0

$$\mathbf{G}= l\mathbf{g_1}+p\mathbf{g_2}$$

with ##\mathbf{g_1}=\frac{2\pi(1,\sqrt 3)} {3a}## and ##\mathbf{g_2}=\frac{2\pi(1,-\sqrt 3)} {3a}##. But i don't know to how to formulize any other elements. For example i have tried to find the ##\mathbf{k}## with $$\mathbf{k}=\sum_{j=1}^2 \frac {m_j} {N_j} \mathbf{G_j}$$ However i didnt succeed.

How can i study to this topic and solve the equation?