Source: wikibot/schnirelmann-density
= Schnirelmann density
{wiki=Schnirelmann_density}
Schnirelmann density, named after the Russian mathematician L. L. Schnirelmann, is a concept in additive number theory that quantifies how "thick" a subset of the natural numbers is. In simple terms, it is a way to measure how much of the natural numbers can be "covered" by a given set.