positive integer

We assume that in our drawing, m is the smallest positive integer satisfying this equation.

The assumption would be valid only if there is no smaller positive integer that satisfies it.

From that point, Douglas Adams’s number was the last positive integer lower than 100 whose representation as a sum of three integer cubes was unknown.

For a positive integer n, n! is the product of the integers 1 through n.

It’s fun to prove to yourself that there is only one way to represent a given positive integer in the factoradic system.