The trivial subsets of a set are those subsets which can be found without knowing the contents of the set.
The empty set has one trivial subset: the empty set.
Every nonempty set S has two distinct trivial subsets: S and the empty set.
Explanation:
This is due to the following two facts which follow from the definition of subset:
Fact 1: Every set is a subset of itself.
Fact 2: The empty set is subset of every set.
The definition of subset says that if every element of A is also a member of B then A is a subset of B. If A is the empty set then every element of A (all 0 of them) are members of B trivially. If A = B then A is a subset of B because each element of A is a member of A trivially.
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the difference between a subset and a proper subset
Since ASCII ⊊ unicode, I don't know if there are ASCII codes for subset and proper subset. There are Unicode characters for subset and proper subset though: Subset: ⊂, ⊂, ⊂ Subset (or equal): ⊆, ⊆, ⊆ Proper subset: ⊊, ⊊,
give example of subset
A subset of a set S can be S itself. A proper subset cannot.
A subset is a division of a set in which all members of the subset are members of the set. Examples: Men is a subset of the set people. Prime numbers is a subset of numbers.