1. Subset (부분집합) A , B : sets.
B : a subset of A
: . notation :
2. Equality of sets (집합의 상등) A , B : sets.
A=B
: :
3. Cartesian Product (카테이션 곱) A , B : sets.
AB={(a,b) }
; Cartesian product of A and B
4. Ordered Pairs (순서쌍) A , B : sets.
. (a,b) { {a}, {a,b} }
5. Relation (관계) A , B : sets.
ℜ: a relation from A to B
ℜ
6. Equivale