∑
Set Notation
★☆☆☆☆Elementary
📖Definition
Set notation includes symbols for sets and their operations: ∈, ⊆, ∪, ∩, etc.
📐Formulas
x ∈ A
x is an element of A
A ⊂eq B
A is a subset of B
A ∪ B
Union
A ∩ B
Intersection
A^c or \barA
Complement
∅ or
Empty set
✏️Examples
예제 1
If A = {1, 2, 3}, check if 2 ∈ A.
⚡Applications
Logic
Truth sets
Databases
Query operations
Programming
Data structures
#집합#원소#set#element