Set Theory Symbols Flashcards

1
Q

{ }

A

Set

a collection of elements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A ∪ B

A

Union

in A or B (or both)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A ∩ B

A

Intersection

in both A and B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A ⊆ B

A

Subset

A has some (or all) elements of B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A ⊂ B

A

Proper Subset

A has some elements of B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A ⊄ B

A

Not a Subset

A is not a subset of B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A ⊇ B

A

Superset

A has same elements as B, or more

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

A ⊃ B

A

Proper Superset

A has B’s elements and more

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A ⊅ B

A

Not a Superset

A is not a superset of B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
A

Power Set

All subsets of A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A∆B

A

Symmetric Difference

Objects that belong to A or B but not to their intersection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A⊖B

A

Symmetric Difference

Objects that belong to A or B but not to their intersection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
A

Set Membership

Belongs to set membership

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
A

No Set Membership

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
A

Ordered Pair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A×B

A

Cartesian Product

Set of all ordered pairs from A and B
A×B = {(a,b)|a∈A , b∈B}

17
Q

|A|

A

Cardinality

The number of elements of set A
A={3,9,14}, |A|=3

18
Q

Ø

A

Empty Set

Ø = {} A = Ø

19
Q

A

Real Numbers

Can be defined as the union of both rational and irrational numbers.

20
Q

A

Complex Numbers

21
Q

A

Integer Numbers

Denote the set of integers.
ℤ={…,−3,−2,−1,0,1,2,3,…}