Since {} is a subset of every set, it is a subset of itself? and hence {} = {{}}?
58594
Is the empty set a subset of itself?
130418
Is ${\{\emptyset,\{\emptyset\},\{\{\emptyset\}\},\{\{\{\emptyset\}\}\},...\}} $ a set?
14512
Why cannot a set be its own element?
122271
A subset of a transitive set is transitive
110201
Difference between var = {} and var = []?
136755
Direct proof of empty set being subset of every set
13661
Axiom of Regularity allows for this set be an element of itself
68244
Is ∅ equivalent to {∅}?
63717
Is the closure of a set equal to the closure of the closure of that set?
51434
What does the symbol $\subset\subset$ mean?
74860
Why is the empty set a subset of every set?
153551
Is the null set a subset of every set?
44160
Set theory: difference between belong/contained and includes/subset?
97373
Is whether a set is closed or not a local property?
78556
Why isn't [1,2,3] equal to itself in Javascript?
87830
Relating the union of the power set of a set to the set itself
125317
Is this statement "Every element in the empty set is greater than itself." true or its negation is true?