Add professors names to DM

modules/level-4/cm-1020-discrete-mathematics/README.md

@@ -3,6 +3,7 @@
 ### Table of contents
 
 - [Discrete Mathematics](#discrete-mathematics)
+- [Professor(s)](#professors)
 - [Topics covered](#topics-covered)
 - [Assessment](#assessment)
 - [Module specification](#module-specification)
@@ -31,6 +32,10 @@ the fundamental discrete mathematical tools that will support you during
 the BSc degree. Particular attention is paid to notions of
 experimentation, reasoning and generalisation.
 
+## Professor(s)
+- Dr. Lahcen Ouarbya
+- Dr. Abdelkrim Alfalah
+
 ## Topics covered
 
 [See this fabulous mind map for more details](https://github.com/world-class/binary-assets/blob/master/modules/cm1020-dm/CM-1020_DM_mind_map.png).