Teilnatürliche
Teilnatürliche is not a widely established term in mathematics or in German mathematical literature. As a compound, it literally means “part-natural” and could be used informally to refer to a subset of the natural numbers selected according to a rule. Because it is not standardized, its precise meaning depends on the source and context.
In practice, one might encounter “Teilnatürliche Zahlen” to denote the numbers in N that satisfy a given
Because the term is nonstandard, readers should consult the exact definition in the text where it appears.
Etymologically, the word combines Teil (part) and natürlich (natural), reflecting a common German practice of naming
See also: natural numbers, subset, predicate, constructive mathematics.