Set as an element of itself
13661
Axiom of Regularity allows for this set be an element of itself
71976
Is every element on a set also a set?
92624
Javascript literal object, reference to itself
30660
Empty set does not belong to empty set
113083
How to prove a set equality?
69957
When is "self" required?
71902
How to define binary operation on arbitrary set in order to create a group structure.
97951
Is the void set (∅) a proper subset of every set?
82315
is an empty set an element of {empty set}
68244
Is ∅ equivalent to {∅}?
3070
What is the C# equivalent to PHP's "self::"?
18364
When does the set enter set theory?
61057
Set attribute without value
87646
How to avoid explicit 'self' in Python?
3101
Meaning of a set in the exponent
123107
Python "Every Other Element" Idiom
119982
how to express the set of natural numbers in ZFC