diff --git a/8_many_atoms_sol.md b/8_many_atoms_sol.md
deleted file mode 100644
index 69261c2e5de0c0c7eb8ab6d8b08aab2e0a2d1d72..0000000000000000000000000000000000000000
--- a/8_many_atoms_sol.md
+++ /dev/null
@@ -1,20 +0,0 @@
-```{python initialize=true}
-import matplotlib
-from matplotlib import pyplot
-
-import numpy as np
-
-from common import draw_classic_axes, configure_plotting
-
-configure_plotting()
-
-pi = np.pi
-```
-
-# Solutions for lecture 7 exercises
-
-## Exercise 1: analyzing the diatomic vibrating chain
-
-### Subquestion 1
-
-
diff --git a/AUTHORS.md b/AUTHORS.md
index 49fcd18cb415ec8c02a659e5729479fcb6e5a900..53e62af84ce9bcc944a8decfb443f21fbde75dc8 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -9,6 +9,7 @@ The following people contributed to making of these lecture notes:
 * Sander Otte
 * Sathish Kumar RK
 * Toeno van der Sar
+* Lars kleyn Winkel
 
 <!--
 Execute
diff --git a/src/8_many_atoms_sol.md b/src/8_many_atoms_sol.md
index f0dab83fd3e4cf5dfc66b7546a50f76ad08b37c9..e672ffc707b6b469106ccf986de2bd9b4f965a26 100644
--- a/src/8_many_atoms_sol.md
+++ b/src/8_many_atoms_sol.md
@@ -11,11 +11,11 @@ configure_plotting()
 pi = np.pi
 ```
 
-# Solutions for lecture 7 exercises
+# Solutions for lecture 8 exercises
 
 ## Exercise 1: analyzing the diatomic vibrating chain
 
 ### Subquestion 1
 
 
-8_many_atoms_sol.md
\ No newline at end of file
+8_many_atoms_sol.md