diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 0dfa031..913699d 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -73,14 +73,14 @@
             "state": {
               "type": "pdf",
               "state": {
-                "file": "Foundation of data science/slides/Principal Component Analysis.pdf",
+                "file": "Foundation of data science/slides/FDS_linear_regression_w_notes.pdf",
                 "page": 1,
-                "left": -9,
-                "top": 409,
-                "zoom": 1.5875
+                "left": -13,
+                "top": 544,
+                "zoom": 1.190625
               },
               "icon": "lucide-file-text",
-              "title": "Principal Component Analysis"
+              "title": "FDS_linear_regression_w_notes"
             }
           }
         ],
@@ -257,6 +257,8 @@
   },
   "active": "a72e67571f49a527",
   "lastOpenFiles": [
+    "Foundation of data science/slides/Normal_equation_poly_lwr.pdf",
+    "Foundation of data science/slides/Principal Component Analysis.pdf",
     "Foundation of data science/slides/FDS_backprop_new.pdf",
     "Biometric Systems/slides/LEZIONE6_Face recognition2D.pdf",
     "Biometric Systems/notes/6. Face recognition 2D.md",
@@ -275,8 +277,6 @@
     "Biometric Systems/slides/LEZIONE1_Introduzione.pdf",
     "Biometric Systems/notes/2. Performance indexes.md",
     "Biometric Systems/notes/11. Fingerprints.md",
-    "Biometric Systems/slides/Biometric_System___Notes.pdf",
-    "Biometric Systems/slides/LEZIONE11_Fingerprints.pdf",
     "Biometric Systems/notes/13. Multi biometric.md",
     "Biometric Systems/notes/3. Recognition Reliability.md",
     "Biometric Systems/frequently asked questions/BS_questions.txt.md",