The combustion of the hydrogen and of the oxygen at the point of the cylinder produces solely the vapor or steam of water. Five Weeks in a Balloon by Verne, Jules View in context.
Factorial number system. In combinatorics, the factorial number system, also called factoradic, is a mixed radix numeral system adapted to numbering permutations. It is also called factorial base, although factorials do not function as base, but as place value of digits.
The factorial value of 0 is defined as equal to 1. The factorial values for negative integers are not defined. Mathematically, the formula for the factorial is as follows. If n is an integer greater than or equal to 1, then n! = n(n - 1)(n - 2)(n - 3) ... (3)(2)(1) If p = 0, then p! = 1 by convention. The factorial is of interest to number theorists. It often arises in probability calculations, particularly those involving combinations and permutations. The factorial also arises occasionally in calculus and physics.