Symbol Cheat Sheet Flashcards
1
Q
N (Fancy N)
A
Natural Numbers
2
Q
Z (Fancy Z)
A
Integers (Zählen)
3
Q
Q (Fancy Q)
A
Rational Numbers (Quoziente)
4
Q
R (Fancy R)
A
Real Numbers
5
Q
¬
A
Not, Negation
6
Q
∨
A
Or
7
Q
∧
A
And
8
Q
≡
A
Logically Equivalent
9
Q
|
A
Divides
10
Q
⇒
A
Implies
11
Q
⇔
A
If and Only If (iff)
12
Q
∈
A
In
13
Q
∈ (With dash through it)
A
Not In
14
Q
{ }, ∅
A
Empty Set
15
Q
∩
A
Intersection (Of Sets)
16
Q
∪
A
Union (Of Sets)
17
Q
S^c, S(bar)
A
Set Complement (With Respect to a Universe U)
18
Q
S - T
A
Set Difference
19
Q
S x T
A
Cartesian Product
20
Q
⊂
A
Subset
21
Q
⊆
A
Subset Or Equal
22
Q
⊆ (With dash through bar)
A
Proper / Strict Subset (Subset Not Equal)
23
Q
⊃
A
Contains
24
Q
⊇
A
Contains Or Equal
25
Q
⊇ (With dash through bar)
A
Properly / Strict Contains (Contains Not Equal)
26
Q
∀
A
For All
27
Q
∃
A
There Exists
