update config and intersphinx

Author: HumphreyYang

lectures/_config.yml

@@ -35,7 +35,7 @@ latex:
     targetname: quantecon-python-intro.tex
 
 sphinx:
-  extra_extensions: [sphinx_multitoc_numbering, sphinxext.rediraffe, sphinx_exercise, sphinx_togglebutton, sphinx_proof, sphinx_tojupyter] 
+  extra_extensions: [sphinx_multitoc_numbering, sphinxext.rediraffe, sphinx_exercise, sphinx_togglebutton, sphinx.ext.intersphinx, sphinx_proof, sphinx_tojupyter] 
   config:
     # false-positive links
     linkcheck_ignore: ['https://doi.org/https://doi.org/10.2307/1235116']
@@ -68,6 +68,31 @@ sphinx:
         binderhub_url             : https://mybinder.org  # The URL of the BinderHub (e.g., https://mybinder.org)
         colab_url                 : https://colab.research.google.com
         thebe                     : false  # Add a thebe button to pages (requires the repository to run on Binder)
+    intersphinx_mapping:
+      pyprog:
+        - https://python-programming.quantecon.org/
+        - null
+      intro: 
+        - https://intro.quantecon.org/
+        - null
+      dle:
+        - https://quantecon.github.io/lecture-dle/
+        - null
+      dps:
+        - https://quantecon.github.io/lecture-dps/
+        - null
+      eqm:
+        - https://quantecon.github.io/lecture-eqm/
+        - null
+      stats:
+        - https://quantecon.github.io/lecture-stats/
+        - null
+      tools:
+        - https://quantecon.github.io/lecture-tools-techniques/
+        - null
+      dynam:
+        - https://quantecon.github.io/lecture-dynamics/
+        - null
     mathjax3_config:
       tex:
         macros:

lectures/complex_and_trig.md

@@ -39,7 +39,7 @@ by linear difference equations or linear differential equations.
 For example, these tools are keys to understanding outcomes attained by Paul
 Samuelson (1939) {cite}`Samuelson1939` in his classic paper on interactions
 between the investment accelerator and the Keynesian consumption function, our
-topic in the lecture {doc}`Samuelson Multiplier Accelerator <samuelson>`.
+topic in the lecture {doc}`Samuelson Multiplier Accelerator <dynam:samuelson>`.
 
 In addition to providing foundations for Samuelson's work and extensions of
 it, this lecture can be read as a stand-alone quick reminder of key results