The empty set!
yes, if the set being described is empty, we can talk about proper and improper subsets. there are no proper subsets of the empty set. the only subset of the empty set is the empty set itself. to be a proper subset, the subset must be strictly contained. so the empty set is an improper subset of itself, but it is a proper subset of every other set.
That is how "subsets" are defined.
There is only one empty set, also known as the null set. It is the set having no members at all. It is a subset of every set, since it has no member that is not a member of any other set.
There is no such concept as "proper set". Perhaps you mean "proper subset"; a set "A" is a "proper subset" of another set "B" if:It is a subset (every element of set A is also in set B)The sets are not equal, i.e., there are elements of set B that are not elements of set A.
Yes,an empty set is the subset of every set. The subset of an empty set is only an empty set itself.
Yes the null set is a subset of every set.
No. The empty is the a subset of every set and every set is a subset of itself.
The null set. It is a subset of every set.
prove that every subset of a finite set is a finite set?
It isn't. The empty set is a subset - but not a proper subset - of the empty set.
The null set. Every set is a subset of itself and so the null set is a subset of the null set.
Every set contains the empty set. Every set is a subset of itself.
The empty set!
The empty set is a subset of all sets. No other sets have this property.
A is a subset of a set B if every element of A is also an element of B.
The definition of subset is ; Set A is a subset of set B if every member of A is a member of B. The null set is a subset of every set because every member of the null set is a member of every set. This is true because there are no members of the null set, so anything you say about them is vacuously true.