Solutions lecture 7

src/7_tight_binding_model_sol.md

@@ -55,5 +55,5 @@ pyplot.show()
 
 4.
 
-Hint: The group velocity is given as $v = \frac{d\omega}{dk}$, draw a coordinate system with $k$ on the x-axis **under** or **above** the dispersion graph in which you draw $\frac{d\omega}{dk}$.
+Hint: The group velocity is given as $v = \frac{d\omega}{dk}$, draw a coordinate system **under** or **above** the dispersion graph with $k$ on the x-axis in which you draw $\frac{d\omega}{dk}$.