import proveit
# Prepare this notebook for defining the common expressions of a theory:
%common_expressions_notebook # Keep this at the top following 'import proveit'.
# the theory is in the current directory:
from proveit.numbers.numerals.decimals.deci import DigitSet
theory = proveit.Theory('.') # adds theory root to sys.path if necessary
%begin common
Digits = DigitSet()
%end common