diff --git a/Algo/Séminaire/Chapter 3 - Case analysis.md b/Algo/Séminaire/Chapter 3 - Case analysis.md
index 2aa4738..3f49d9a 100644
--- a/Algo/Séminaire/Chapter 3 - Case analysis.md	
+++ b/Algo/Séminaire/Chapter 3 - Case analysis.md	
@@ -149,3 +149,16 @@ val avg : int -> int -> int = <fun>
 ```
 > 💭 We read that like "let avg the function that to a associate the function that to b associate a+b divided by two"
 
+**For the match function**
+```Ocaml
+# let f x = watch x with 
+	| 0 -> 18
+	| 1 -> 24
+	| _ -> x*x ;;
+# let f = function 
+	| 0 -> 18
+	| 1 -> 24
+	| _ -> x * x;;
+```
+
+### Filtering several values