Mängd
In mathematics, a mängd is a collection of distinct objects considered as a whole. The objects are called elements of the mängd. In a mängd, the order of elements is irrelevant and duplicates are not allowed. The empty set, denoted by ∅, is the unique mängd with no elements.
Notational basics include the membership symbol ∈, where x ∈ A means x is an element of the
Common constructions and concepts include the power set P(A), the set of all subsets of A, and
Mängdteori, the theory of sets, provides the formal foundations for much of mathematics. Modern foundations are