Tom's May 29 addition of a new lecture ak2.md (#450)

* Tom's May 29 addition of a new lecture ak2.md

* move align to aligned for pdf output

* fix aligneded

* supress output from first code-cell

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Co-authored-by: thomassargent30 <ts43@nyu.edu>

Author: mmcky

lectures/_toc.yml

@@ -55,7 +55,7 @@ parts:
   - file: money_inflation_nonlinear
   - file: laffer_adaptive
   #- file: french_rev
-  #- file: ak2
+  - file: ak2
 - caption: Stochastic Dynamics
   numbered: true
   chapters: