Symbol |
Meaning |
Section in which the symbol and its explanation appear first |
---|---|---|
a ∈ A |
a belongs to the set A |
1.1 |
a ∉ A |
a does not belong to the set A |
1.1 |
Ø |
Empty set (Phi) |
1.1.2 |
⇔ |
If and only if |
1.1.3 |
|A| |
Cardinality of A |
1.1.3 |
A ⊆ B |
A is a subset of the set B |
1.1.4 |
A ⊂ B |
A is proper subset of the set B |
1.1.4 |
℘(A) |
Power set of A |
1.1.5 |
A ∪ B |
Union of sets A and B |
1.1.6 |
A ∩ B |
Intersection of sets A and B |
1.1.6 |
A − B |
Complement of B in A |
1.1.6 |
A′ |
Complement of A |
1.1.6 |
<a, b> |
Ordered pair |
1.1.10 |
A × B |
Cartesian product |
1.1.11 |
aRb or Rab |
a is related to b under the relation R |
1.2 |
R′ |
Complement of relation |
1.2.3 |
R^{−1} |
Inverse of relation R |
1.2.3 |
F(x) |
Image of x under f |
1.3 |
F: A → B |
Function ... |
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