Tom's Feb 20 edits of 2 lectures and toc

Author: thomassargent30

lectures/_toc.yml

@@ -11,6 +11,7 @@ parts:
   - file: complex_and_trig
   - file: eig_circulant
   - file: svd_intro
+  - file: var_dmd
   - file: newton_method
 
 - caption: Elementary Statistics