Add mathematical supplement

Author: BuildingAtom

index.markdown

@@ -54,6 +54,10 @@ links:
     icon-library: simpleicons
     text: ArXiv
     url: https://arxiv.org/abs/2409.16915
+  - icon: bi-file-earmark-text-fill
+    icon-library: bootstrap-icons
+    text: Math Supplement
+    url: https://github.com/user-attachments/files/20892287/Splanning_Mathematical_Supplement.pdf
   - icon: github
     icon-library: simpleicons
     text: Code (Coming Soon!)
@@ -298,4 +302,4 @@ window.addEventListener("load", function() {
     video.play();
   });
 });
-</script>
+</script>