From 761a81a18f4976e7d10d3fa146f4f45a95701a27 Mon Sep 17 00:00:00 2001
From: Lars kleyn Winkel <l.kleynwinkel@student.tudelft.nl>
Date: Thu, 13 Feb 2020 11:04:06 +0000
Subject: [PATCH] Update src/8_many_atoms_sol.md

---
 src/8_many_atoms_sol.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/8_many_atoms_sol.md b/src/8_many_atoms_sol.md
index 38e73639..2381766a 100644
--- a/src/8_many_atoms_sol.md
+++ b/src/8_many_atoms_sol.md
@@ -66,9 +66,10 @@ pyplot.plot(k[199:100:-1],-(t1+t2)*np.cos(k[0:99]/2),'r--',label='1 atom dispers
 pyplot.plot(k[299:200:-1],-(t1+t2)*np.cos(k[300:399]/2),'r--')
 
 pyplot.xlabel('$ka$'); pyplot.ylabel(r'$E-\epsilon$')
-pyplot.xticks([-2*pi, -pi, 0, pi,2*pi], [r'$-2\pi',r'$-\pi$', 0, r'$\pi$',r'$2\pi$'])
-pyplot.yticks([-t1-t2, 0, t1+t2], [r'$-t_1-t_2$', 0, r'$t_1+t_2$']);
+pyplot.xticks([-2*pi, -pi, 0, pi,2*pi], [r'$-2ka$',r'$-ka$', 0, r'$ka$',r'$2ka$'])
+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], -3, 3, linestyles='dashed');
+pyplot.hlines([np.abs(t1-t2),-np.abs(t1-t2)],-2*pi,2*pi, linestyles='dashed');
 
 pyplot.legend(loc='lower center');
 ```
-- 
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