can the empty set contain itself?
30660
Empty set does not belong to empty set
150825
Is an empty set equal to another empty set?
10229
Cyclic group generated by empty set.
31212
The existence of the empty set is an axiom of ZFC or not?
113460
The only sets in $R^n$ which are both open and closed are the empty set and $R^n$ itself.
25834
Proof a set cannot contain its own powerset - Russell's Paradox
8082
What is A Set Raised to the 0 Power? (In Relation to the Definition of a Nullary Operation)
16056
Is empty set element of every set if it is subset of every set?
45508
Is the empty set a group?
158541
Does SOQL query get consumed when querying from an empty set?
65308
Axiom of Choice: Family of non-empty sets mutually disjoint or not?
27107
intersection of the empty set and vacuous truth
27025
How do I choose an element from a non-empty set?
858
Is $\{\emptyset\}$ a subset of $\{\{\emptyset\}\}$?
34099
Proving that the empty set is unique
81351
Polish space in which the interior of each compact set is empty
137563
Can a left coset be strictly contained in a right coset?