empty sets
Collections without members
Empty sets are sets containing no elements—the mathematical concept of nothing as a collection.
In set theory, there is exactly one empty set, denoted by ∅ or .
The term extends figuratively to situations yielding no results: The search returned empty sets.
Also called null sets.
- vacuityUtter emptiness or blankness
- cardinalitySize of a set
- subsetCollection within collection
- elementsFundamental parts or substances
- nothingnessComplete absence of existence
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