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Last updated 5:49 AM on 3/27/26
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10 Terms

1
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Universal set

A set that contains all the elements related to a specific context

2
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Subset

If every element of the first set is also an element in another set.

3
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Proper subset

If every element of the first set is also an element of another set, but there is at least one element of the second set that is not in the first set.

4
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Equal set

If and only if every element of a set is in another set, and vice versa.

5
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Union set

Combining the elements.

6
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Intersection set

The common elements

7
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n(A) - n of A

The number of elements of the set

8
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Complement

All the elements in universal set that are not in a.

9
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Difference

All elements in A that are not in B.

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Disjoint (empty set or null set)

No elements in common