Devin Jeanpierre writes: [...]
> domain of the natural numbers. Knuth says that thought of > combinatorially on the naturals, x**y counts the number of mappings > from a set of x values to a set of y values. It's the other way around, of course: from a set of y values to a set of x values. Which reminds me of a question that once made me smile, even laugh, and still does: 2**3 is almost 3**2 but not quite - what gives? > Clearly there's only one mapping from the empty set to itself: the [...] -- https://mail.python.org/mailman/listinfo/python-list
