Update src/8_many_atoms_sol.md

src/8_many_atoms_sol.md

@@ -69,7 +69,7 @@ pyplot.xlabel('$ka$'); pyplot.ylabel(r'$E-\epsilon$')
 pyplot.xlim([-2*pi,2*pi])
 pyplot.ylim([-1.1*(t1+t2),1.1*(t1+t2)])
 pyplot.xticks([-2*pi, -pi, 0, pi,2*pi], [r'$-2\pi$',r'$-\pi$', 0, r'$\pi$',r'$2\pi$'])
-pyplot.yticks([-t1-t2, -np.abs(t1-t2), 0, np.abs(t1-t2), t1+t2], [r'$t_1+t_2$',r'$|t_1-t_2|$', '0', r'$-|t_1-t_2|$', r'$-t_1-t_2$']);
+pyplot.yticks([-t1-t2, -np.abs(t1-t2), 0, np.abs(t1-t2), t1+t2], [r'$t_1+t_2$',r'$-|t_1-t_2|$', '0', r'$|t_1-t_2|$', r'$-t_1-t_2$']);
 pyplot.vlines([-pi, pi], -2*(t1+t2)*1.1,2*(t1+t2)*1.1, linestyles='dashed');
 pyplot.hlines([-np.abs(t1-t2), np.abs(t1-t2)], -2*pi, 2*pi, linestyles='dashed');
 pyplot.fill_between([-3*pi,3*pi], -np.abs(t1-t2), np.abs(t1-t2), color='red',alpha=0.2);
@@ -128,5 +128,15 @@ pyplot.tight_layout();
 
 ## Exercise 3: atomic chain with 3 different spring constants
 
+### Subquestion 1
+
+### Subquestion 2
+
+### Subquestion 3
+
+### Subquestion 4
+
+### Subquestion 5
+