Sets (symbol meanings)

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9 Terms

1
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Element

∈

2
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Not an element

∉

3
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null set

∅

4
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subset

⊂

5
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not a subset

 ⊄

6
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Cardinal number

#

7
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Union

U

8
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Intersection

∩

9
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the elements in one set but not in the other

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