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Difference between Subset and proper subset: Introduction of Subset and proper subset in Senior High School Mathematics.
1, subset is a mathematical concept. If any element of set A is an element of set B, then any a∈A, a ∈ b.

2. Then set A is called a subset of set B. ..

3. If set A is a subset of set B, and at least one element in set B does not belong to a, then set A is called the proper subset of set B..

4. An empty set is a subset of any set.

5, rather than any set of proper subset, such as empty set is not proper subset's empty set.

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