The python scripts "problem-64.py" and "problem-64-ordered.txt"
perform the straightforward but tedious recursion and expansion
involved in the solution of Problem 64. The scripts deal with the case
of Yang-Mills theory.


To run the scripts (inside a jupyter console), do:
    load "problem-64.py"

or

    load "problem-64-ordered.txt"


The output of the scripts is included in the file "output.txt"
