Question

what is proper set ?

Answer 1

Proper subset definition. A proper subset of a set A is a subset of A that is not equal to A . In other words, if B is a proper subset of A , then all elements of B are in A but A contains at least one element that is not in B .

Answer 2

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Any Set called A is said to be the proper subset of B if every element of A is an element of B , but A should not be equal to B.