set notation

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10 Terms

1
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{ a, b }

Set: collection of elements

2
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A ∪ B

Union: elements that belong to set A or set B

3
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A ∩ B

Intersection: elements in both A and B

4
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A ⊆ B

Subset: has few or all elements equal to the set

5
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A ⊂ B

Proper Subset: A has some elements of B

6
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Ø

Empty set

7
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A' (Ac)

Complement: all objects that do not belong to set A

8
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a∈B

Element of: a is a member of Set B

9
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|B|

Cardinality: Number of elements in Set B

10
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U

Universal set: all elements