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(set theory) relative complement
In math class, the teacher explained the concept of relative complement.
(set theory) union
In math class, we learned about the concept of union.
(set theory) absolute complement
The concept of the absolute complement plays an important role in set theory.
set theory
He wants to learn deeply about set theory.
(set theory) set operation
Set operation is one of the basic concepts in mathematics.
collective noun
He is learning how to use collective nouns.
(mathematics) empty set
In mathematics, an empty set refers to a set that does not contain any elements.
power set (set of all subsets of a set)
A power set is a set consisting of all subsets of a set.
(set theory) intersection
In math class, we learned about the intersection.
In math class, we learned about the concept of union sets.
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