Assertion: set | /r/HasProperty | null
Facets:
value: in some textbooks
type: LOCATION
value: in popularizations
type: LOCATION
Source sentences:
text: With respect to R n {\displaystyle \mathbb {R} ^{n}} 1-point sets are null, and therefore all countable sets are null.
text: A. Similarly, there is a notion of the nullary intersection, that is the intersection of zero sets (meaning no sets, not null sets).
text: In some textbooks and popularizations, the empty set is referred to as the "null set".
text: 1-point sets are null, and therefore all countable sets are null.