Bestimmtheitsgrundsatz Definition, Rechtsbegriff & Erklärung Moreover, the empty product, that is the product of a set of zero numbers, is also 1. An element with a multiplicative inverse is called a unit, generalizing the role of 1. More generally, in algebra, it denotes the multiplicative identity in any unital non gamstop casino ring or field. Each natural number, including 1, is constructed by...