typo

src/3_drude_model_solutions.md

@@ -10,7 +10,7 @@ $$
 V_H = -\int_{0}^{W} E_ydy
 $$
 
-where $E_y = -\v_xB$.
+where $E_y = -v_xB$.
 
 $R_{xy}$ = $-\frac{B}{ne}$, so it does not depend on the sample geometry.