Assertion: set | /r/HasAspect | element
Facets:
Source sentences:
text: : There exists a set, denoted by \({\varnothing}\) and called the empty set, which has no elements.
text: The sets {a}, {1}, {b} and {123} each have one element, and so they are equivalent to one another.
text: In mathematics, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero.
text: The Empty Set has no elements: {}
text: is the empty set, the set which has no elements.
text: Initially a set has one element and a rank of zero.