diff --git a/preliminaries/motifs-and-structral-roles_lecture.md b/preliminaries/motifs-and-structral-roles_lecture.md
index 6908b22..791e17e 100755
--- a/preliminaries/motifs-and-structral-roles_lecture.md
+++ b/preliminaries/motifs-and-structral-roles_lecture.md
@@ -1,3 +1,10 @@
+---
+layout: post
+title: Motifs and Structral Rules in Network
+header-includes:
+   - \usepackage{amsmath}
+---
+
 # Motifs and Structral Rules in Network
 
 ## Subgraphs