set notation symbols

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17 Terms

1
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∈
...is an element of...
2
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∉
...is NOT an element of...
3
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⊂
...is a proper subset of...
4
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⊄
...is NOT a proper subset of...
5
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⊆
...is a subset of...
6
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⊈
...is NOT a subset of...
7
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Ø
Empty set or Null set
8
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U
Universal Set
9
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ℕ
Natural or counting numbers (0, 1, 2, 3,)
10
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n(A)
the number of elements in set A
11
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A'
complement of A (includes all elements of U which are not elements of A)
12
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Z
all integers
13
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Q
rational numbers (a fraction)
14
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R
Real numbers (can be placed on a number line)
15
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Q'
Irrational numbers (cannot be expressed as a fraction)
16
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A⊆B
A is a subset of B (all elements of A are also elements of B icnluding A=B)
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A⊂B
A is a proper subset of b (every element of A is an element of B but A does not equal to B)